Action Support as well
I also use Action Support for those things. I actually have 2 of them, one is a file folder in my top desk drawer. That drawer also contains my tickler file and folders for paper materials for active projects. The other is a bit more esoteric, it's a section on the counter by the front door. A lot of my action support items are physical things that need to go to another building or location so I place them all there. I keep thinking I need to get a pretty basket or something for them but haven't so far. It may look cluttered but at least it's contained into a single area.
I agree that the inbox is only for unprocessed stuff. Otherwise there are no clean edges and it gets impossible for me to maintain.
Oogie McGuire - Mac, iPhone & Omnifocus
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Paonia, CO USA