Hey James,
Great topic. Glad to see you've read Trading in the Zone. It's a simple yet effective read in regards to trading psychology.
So you want to develope a consistently successful traders mindset. First you need to understand there is no such thing as faliure. Every action you take is a lesson learned. And being in action is always better than inaction. You can always make adjustments once you've got things moving.
You consistent success will start with your belief system, the way you frame the game of trading and what you do consistently on a daily basis. Rememeber, repetition is the mother of learning, taking correct action in line with your system on a daily basis will stack up associations in your brain to control your unconscious actions. This is why
Mark Douglas is so strict about the 20 sample sizes. Having very strict rigid rules over time, you will begin to train your mind in taking the correct actions.
Here's a little insight for everyone. When an adult is learning something new, it takes 50 attemps to prove they cannot tackle that new endeavour. However, many people will rarely go over 2-3 attemps before they believe they are not capable of doing it. In trading many times it's 2 steps forward, 1 step back. 2 steps forward, 1 step back. Those steps back may look like faliures, but what they really are is lessons to be learned we missed the first time around.
If your interested in understanding more about trading psychology I've written a few posts on my blog.
www.evolvedtrader.com
Best of luck on gaining your consistent trading success,
Ryan