by bmat » Aug 30th, '10, 02:56 
			
			Small riffle first is the way to go, also practice.
I like the riffle not only because it will help with your problem but it adds to my routine.  Here is one of the routines I use with the deck. 
I start out showing the deck as normal I keep cutting showing backs and faces as I talk about how poweful thoughts can be. Especially with magic because after all the magic does not happen in the magicians hands, it does not happen with a prop, a coin, a card.  No, magic only happens in the mind.  Sometimes while I play with a deck of cards and I'm not thinking about anything and look what happens, (cut, show a blank, another cut another blank, show backs and fronts)  Now, when I think of a card say the 3 of hearts, the 3 of hearts appears, (cut and show three of hearts) or the four of diamonds (cut show four of diamonds) in fact if I think of all the cards they all appear, (cut a few more times showing more cards front and back)...
I know what card is going to appear because if you give a small riffle you can casually look down at the edge of the deck you are riffling (bottom towards yourself) and stop when you see a card and cut at that point.  Not only are you guaranteed not to cut to a blank, you know at what card you stopped at.  
Practice a little you will see it all fall into place.
Where are you in the States, there are a lot of magic clubs around, and many universities also have a magic club. Some places have both.