In sight: on mind

I’ve always thought of myself as an “out of sight, out of mind” person. This led me to a life of visible piles. If I put something away, I often forgot about it. Lately, I’ve been feeling like the problem is by having everything visible I am getting overwhelmed and stuck. I am looking for suggestions on a system that allows me to place unfinished tasks into a container that I can remove from the top of my desk at the end of the day, so I can begin the next day with a clean slate. Once I’m ready to take on the old projects I can bring the container back out. Ideas?