Rejection after Rejection: Trying to keep my chin up

Every rejection letter than I get from a regional hurts me. I am still building time as a CFI but the winter months are rough. After these rejection emails, only after the application (no DUIs/failures/PD/Accidents), what do I do? Do I make a new application under a different email or do I keep updating the app that was rejected? How long until I can reapply? What do you guys do in the meantime?