[corndog]

You'll get better with it over time. One good thing to do is verbally announce your actions before you start to reach for chips. Determine how much you want to raise or whatever, say it, then look at your chips to see exactly what you need to grab before reaching for them. Doing this you should minimize the actual time your hand is on the chips during a pot.

After you win a big pot, no big deal. I don't care if people are laughing at my hands shaking when I know that I just took their monies.

Also, I don't consider this sound advice at all, but I'll usually have a beer or two before sitting down to calm the nerves a little. Not enough to give me a buzz or any kind of mental disadvantage (I don't think), but enough to get my body relaxed a little. Try at your own risk.