What I do for Wikipedia
1. Contribute primarily to articles on musical subjects, particularly those dealing with the piano, composition, musicology, and the relation of music to Physics, Mathematics, and other disciplines, as well as my own Public Domain performances and editions of classics.
2. Making minor corrections in articles (spelling, punctuation, grammar, wording, etc.).
3. Tagging articles which apparently require substantial attention.
4. I fight spam, vandalism and other threats to Wikipedia.