Trying My Best

How can you be disappointed in yourself if you strive to be the best at everything you do? I try hard to get everything I want to get done, done. If I don't, I feel like I was not trying hard enough. I am either too lazy, or pushing myself too far. I wish I knew how to be in between. I need to work on accepting days when I don't get everything done and I am not perfect. But, most of the time, I see the things I do wrong or the things I am doing bad.