Practical tuition from an experienced magician is indeed a wonderful thing. Unfortunately, it isn't always possible (which is why boards such as this exist). I further tend to agree with Lommy's observation here: ...it sounds to me as if you're started stumbling down the Ellusionist or worst still YouTube path...
It's not always about figuring out a trick; that's the easy part.
Wow, there's so much there that I don't know where to begin...
First, why do you want to figure out a trick? I know that sounds simplistic and obvious, but it is extremely important. Do you want to know how it's done so you can say, "Ha ha," to the magician performing? Do you want to figure it out because you are just a curious chap? Do you want to figure it out because you just can't stand not to know the secret and it eats away at you? Most importantly, do you want to figure it out because it makes you feel superior? Or, does not knowing make you feel inferior? Finally, do you want to figure it out because you want to be a magician?
Just for the record, figuring out every magic trick in existence doesn't make you a magician (although, if you're an overbearing guy who can't stand not to be the center of attention, it does make you a magician's worst nightmare).
It also worries me that you feel that figuring out a trick is the easy part. At this point, I have to wonder where you've seen the tricks that you've seen. If you are using youboob as a measuring stick of magic presentation, then I can only say that you are correct, figuring it out is fairly easy. If, however, you've seen a magician who is good at what he (or she) does, then figuring it out isn't quite so easy (mainly because he made the magic happen 5 minutes before you realize that it has and going back and trying to reconstruct what he did without the use of a pause or reverse function is nigh on impossible).
So, before you go any further, you must understand why you feel the need to figure magic tricks out and specifically what it is about magic tricks that makes them easy to figure out. This is a self analysis and an important part of starting to do magic for you (assuming that you honestly want to be a magician and perform for real people in real life).
It's learning skills.
Yes, that's what it is, it's learning skills. There are, however, many more skills than just the sleights. Even moreover, there are certain requirements that are generally not spoken of that are just as important - like taking a bath and using deoderant, coming your hair, cleaning and trimming your finger nails, brushing your teeth and learning people skills.
One book that is of great importance to every close up magician, particularly those who must walk up to groups or tables to ply their trade, isn't even a book on magic, specifically. "How to Win Friends and Influence People," by Dale Carnegie, is one of the best books you will ever invest in. This book contains very important information on dealing with people. If you are a magician, then this is what you do - you deal with people. Learn how to get them to like you instantly (long before you whip out your deck of cards) and you will already be ahead of the game comparatively with other magicians.
But, aside from the thumb palm and the Tenkai grip, what other skills are required? Well, there's the all powerful misdirection. There is also vocal skill - proper enunciation (if they can't understand what you're saying because you mumble, you are in trouble). There are theatrics involved and acting, of course. There is body language. There is script writing and blocking.
Now, let me let you in on a little secret...You'll learn more about being a magician on the main forums of this bulletin board than you will in the restricted area. It's all out here, for you to see and read. In the general scheme of things, the sleight of hand tools are the least of what a magician does.
Here's a quote from a magician whose name you should know:
"The true skill of the magician is in the skill he exhibits in influencing the spectator's mind. This is not a thing of mechanics. It is not a thing of digital dexterity. It is entirely a thing of psychological attack. It is completely a thing of controlling the spectator's thinking. Control of the perceptive faculties has nothing whatever to do with it. Convincingly interpreting, to the spectator, what the senses bring to him, in such a way that the magician's objectives are accomplished, is the true skill of the skilled magician." -
Dariel Fitzkee-
If you are up to a very in depth and difficult read, then I would point you to the Fitzkee trilogy, that is availabe for free on the internet. He's not going to teach you any tricks, though. But, with time and diligence he will teach you to be a magician.
Click here if you're interested.
As for other skills, why not take the time to read "Getting Started in Magic - a disorganised guide!" and "little tips..." both of which you'll find near the top of the Support and Tips forum. Those threads are jam packed with important tips and advice. Either open a word processing program or take out a notebook and copy the best of that advice (the best advice being that which you find most important to you and where you are in magic right now).
If you're still with me, you'll notice that learning magic hasn't cost you one, red penneth yet. Still, you're going to need material - even with the skills that I'm talking about above, you still gotta have tricks!

Okay, so where to start? I will go with my advice to every magician under the sun - purchase and study
this book. If you read that book, cover to cover, choose 3 magic tricks out of it to practice and rehearse, you will be a better magician and massively more entertaining that 99.99% of all magicians that you see on youboob. As an added bonus, that book is really, really
cheap and easy to find.
And sometimes the trick if it involves someting you just can't guess.
This is one of your greatest short-comings and, sadly, you have actually chosen for it to be such (rather than something you must physically overcome). Why do you need to guess anything?
Because you want to watch someone else do a trick and then be them. You will not be your own magician, you will be a copy of someone else. Why could you possibly want that?
Sure, you can tell me that you don't want to be someone else, but if you don't honestly have a grasp of why the trick works (and it's not the sleights or method that makes it magic), then you can only mimic what you've seen. You see, without the proper building blocks and an understanding of why they work, then you aren't showing magic, you are showing a puzzle. If all you really want is to show puzzles, then I'm sorry for having wasted your time because this entire post is an abject exercise in uselessness.
If, however, you honestly want to learn magic, then stop trying to steal from people that you see demonstrating on Elusionist and the poor folks who butcher magic on youboob. Make the decision, right now, to honestly learn what magic is and what it's about - remember the Fitzkee quote above.
Spend a little bit of money on magic books or (shudder) DVDs. You are given some good advice all over these boards on what books you should have right from the start - find them (sometimes, you can even find them at your local library). And, there's a good suggestion...Check out what your local library has in their collection on magic books.
Stick around these forums, read what the more advanced members have to say and suggest. Learn.
Mike.