Do you guys keep your action reminders?

[petdr]

For all the paper based GTDers
Do you guys keep your action reminders or just trash it, throw it away when the action is finished?

I use Frixion pens for my lists. If the page is still in good shape, I microwave the paper (the heat erase the Frixion ink) and re-use it. Recycle bin if it's too worn out from rubbing (erasing).

Before I microwave/recycle the pages, those completed actions are recorded elsewhere though -- either in the project support file or my journal. That allows me to backtrack weeks later when I wonder if / when I made that call.