When I do a lot of trades I am experiencing minimal adrenaline rush. It is when I only do a few trades that I get really tense, heart pumping etc. One book I read advised the following system:

1. Identify opportunity
2. Take action automatically
3. Feel good about the trade

This is what I do. By trading a lot I am teaching myself to execute automatically. I feel this is critical because I have lost way more money on trades that I identified but failed to enter than on ones I entered and had to stop out.