I often use tasks to track items I've requested from clients. I set them to repeat every two weeks or so to remind myself to follow up regularly. However, once I receive the item, I don't want that task to keep repeating.

I would love a drop-down arrow next to the checkmark, or even just a keyboard shortcut, for "complete task and stop repeating" without having to remember to manually update the task attribute before marking it complete, lest it show up again two weeks later when it doesn't need to.