[throwaway918299]

This is why a board with sticky notes "TODO - In Progress - Done", is still the way to go for most projects. Easy to manage and you don't need to "groom the backlog" or any of that nonsense. If it's important, it goes on the board. When a bunch of things get done, the notes just go in the trash and you move on to the next thing. If there's too many notes, toss some in the trash and forget about it (if it ends up being important, it's really easy to just write a new note).

[bluGill]

The only downside to that is if you have remote team members they can't do anything to the board.

[cynicalpeace]

Yup, or even simpler- just a checklist in a file.