Two things came up about palming.
1. Patrick, my BF, was writing to me about palming and said that my 'cone hands' were getting more natural. He hit the terminology right on the head. When palming a coin avoid "Cone Hands"!
2. I was doing what Eric Jones said to do. While typing and driving and etc. keep a coin palmed.
Well first of all, this is also helping me shift coins more naturally from palm type to palm type.
Such as, I can't (yet) 'palm' palm a coin while typing but can thumb palm a coin.
Second, when you are palming a coin, watch out for tossing a handful of peanuts into you mouth.
I almost chipped a tooth as the coin joined the peanuts in a race to my throat. ow...