I use TODO: as a specific type of comment, a message to future developers about stuff to do later that isn't a bug or feature: a) Suggestions for refactoring:

I use TODO: as a specific type of comment, a message to future developers about stuff to do later that isn't a bug or feature: a) Suggestions for refactoring: TODO: move this to its own class b) Known future work: TODO: remove this when legacy accounts are deleted c) Warnings: TODO: this probably doesn't scale, suggest XXX instead