Don't write down a list of what you have to do to improve - this is characteristic of a Type-A, high-strung, desperate-to-prove-themselves individual. When you feel yourself slipping into that old, faulted attitude, just recognize it and fix it until it's forced out of your system. You will never be able to write a list long enough to cut out every single attitude problem (nobody ever will), but the very least you can do is realize when things are starting to go wrong and then fix them.

Strive for improvement, but don't THINK about striving for improvement - just let it come from a desire within you. I know it sounds cheesy, but it's the truth. You can't imagine yourself doing something well and do it well at the same time; look at the performance of athletes, experienced aviators, etc., and you'll see it comes from a special type of mental/muscle memory. They don't think; they just do. That's the level of performance everyone should strive for. Don't think of a flight as a chance to prove yourself, but rather an opportunity to BETTER yourself.

How do you get to this level? You gotta challenge yourself. How will you know you're being challenged? You'll know you're being challenged because you'll feel it - it won't feel like just another run-of-the-mill flight or another ILS. You will feel your brain working. Challenging yourself induces humility, learning, and legitimately improves your skills. You WILL become a better pilot - that pilot you used to imagine you were.