For me personally, what I did is palmed 6-10 cards at a time... always... for practice though of course! If I had to palm 4 cards in a routine, I palmed eight! Also I held cards in palm if I was watching TV throughout an entire show but taking breaks during commercials... This helped me tremendously and improved my dexterity with the palm, because now, when I have to palm 1, 2, 3 or 4 cards, It feels so easy and natural because my hands were so used to it kind of like if you are wearing a weighted vest, when you take it off, you feel so light and natural. This worked for me! Hope it helps you!