here are some of my own...erm

keep:
a notebook for any stray ideas
or as back-up, save 'em on your phone as a draft text message
even if it's just a theory, best not to forget it, as you'll pick up new techniques as you learn more and more
inspirations:
if you love a modern day magician, read up on who their influences were - and track those people down..you'll never know where you'll end up, or what skills you'll pick up
simplicity:
it's all very well learning complex sleights, and being silent and superb with them, but if you can't settle down and work out your own routines, what's the point?
make a little list of your favourite, and more importantly, the sleights you're best at, and play to your strengths...incorporate those into your ideas...
other items:
when you come up with an idea, stop...does it have to be cards? or coins?why not photos, or sketches, or even plasticine if it fits in...
overlooking:
never underestimate an old cheap book - 202 methods of forcing by Anneman for a classic example...£3 or £4 quid for some fantastic deviousness...
as stated by plenty of people, alot of "new" effects, are nothing but flash advertising, with absolutely nothing new added. Just produced to look "new"
RRTCM + 3 decks + big fournier practise mat = £19
1 stand alone dvd release by a certain company = £23
Practice:
Stick to 5 (+/-2 depending on the person) things to learn in a month or so...dont flood your brain with too much at a time, breathe...get settled and feel comfortable with yourself...
Learn:
3 effects that you can link together - take your time, never rush anything, not your patter, not your secret stuff, nothing...p-a-c-e...
Inclusion:
Involve people, make them feel part of what you are doing, not just a innocent by-stander...if you see someone watching you, smile and wave them over...slight body contact and a grin will get you everywhere...
And please, not too many show-off effects "look at me do this", how about instead "this is all down to your intuition"..or "due to your inate skills at...", "because you concentrated properly you allowed me to..."
Who are you:
card-sharp? wierdo? freak of nature? scholar of the esoteric? whatever it is, let that run through you, let it reflect in what you do? would a card-sharp be able to bend a coin? or would it be more likely that he could card-count and so on?
finally:
never rest on your laurels, or indeed hardys, learn, read, examine, discover...never copy, dont be an automaton...anyone can follow a crowd, but not many can be followed...
keep on keepin' on brothers and sisters...this is all a beautiful craft, dont soil it by copycat actions or methods...be you...