Nice tip from 43 Folders to handle those tasks that need to be done but not clutter up your to do list between time. Outlook does this when you choose “Regenerate new task [number] weeks after completion” as the recurrence.
43 Folders: The Beauty of the Recurring Task
“A great feature for handling a lot of stuff you don’t want to forget about—but that you don’t want sitting interminably on your to-do list…”