Be careful how you spend it - your mental energy, that is. Wherever the bulk of your energy lies, your behavior is sure to follow. The more mental energy you put into concentrating on the negative, the more negativity you create. Thus, when you make a big deal out of something you have done wrong, when you take yourself too seriously, you are actually setting the stage to repeat the mistake. However, if your energy is abundantly positive, your mind will be in a creative space searching for solutions, seeing possibilities, building on strengths. Spend your energy wisely, and the dividends will follow.