See for me, the money factor never has been something to dent my confidence/cool... so no advice there. As far as doing something to get them from knowing what your doing, there's so much.

Start wearing odd clothes if you've got a big enough pair to not care what they think. It gives em something more to think about, hell, throw a bag over your head and cut out to eyes... you may be goofy, but they're not getting a read on you from the head up...

Play something other than PP's and 10-A, you'll learn to love what can come out of the emphamis 6-7 suited...

Try bluffing... If your scared about the money, then your obviously sticking to your cards and your cards only. If you trust your reading abilities enough, throwing a bluff in will be key especially when they think your very tight from their past experiances