One rule is to not use complicated techniques unless they are necessary to achieve your goal. First, use simple movements, and if they don't work, then introduce the more complex ones.
Bruce LeeThe attitude, 'You can win if you want to badly enough,' means that the will to win is constant. No amount of punishment, no amount of effort, no condition is too 'tough' to take in order to win. Such an attitude can be developed only if winning is closely tied to the practitioner's ideals and dreams.
Bruce Lee