Anything that enhances mental discipline is helpful to a trader- particularly if you consistently trade "solo" without other interactions (other traders, TV, websites, etc.) as I do.
i contemplate my navel while in a trade and even if i lose i feel good about it. zen. zen. everything zen.
I learned meditation about fifteen years ago, before I learned to trade. Meditation helps me in many aspect of my life, including trading. For one thing, I can have a sound sleep no matter how stressful a day I had if I meditate before sleep. Sometimes I was so exhausted and forgot to meditate, I'd find myself woke up for three hours in the mid of night worrying about everything. It's pretty hard to practice to the level that you can feel your life energy flow inside your body.
A rather easy way to achieve a state of relaxation that has not been mentioned here is biofeedback. I had a biofeedfack monitor many years ago. It was not particularly accurate, but I am sure with progress in technology, they must be better, and cheaper now. Very easy to use, no instruction necessary, and it works. Peace, RS
Another way is to listen to techno music with your equalizer set un a v formation.. I'm totally serious try it. If you improve your trading using this method just send me 1% of what you make the first 6 months. I call it "rave your way to riches"
Oddly enough, I contemplate your navel also. If you are a hot babe, that is...if you are a guy, please disregard this message.