i think i heard on this forum somewhere that if you lick the back of your fingers it makes the roll a bit easier and helps the coin from sliding off.
thats another good idea, the same goes for classic palming just do it whenever you bored or watching TV or whenever.Hey man, What you really want to do is watch t.v. or a movie, or as your reading a book or the paper, just do the coin roll.
Dont think about it, and it will look great, and dont forget the other hand..
along with the muscle pass, both hands your GOLDEN!
Good Luck