I define success as something that makes me feel happy for doing it. Say that I have an important project that I want to get a perfect grade on. I'll do it because I want the perfect grade, and after I'm done with the project, I get a perfect grade and I feel happy for myself. I feel glad that I did it. Or maybe even being on here! Getting the answer you need to finish a question, you feel successful.
-Mabel <3