[rlbeaver]

I use a 3-Ring Binder with plastic sheets with slots sized for trading cards. I organize the cardboard heroes by type, etc. Of course, this means I have to unfold them and put them up and then redo them later.

The downside is that I have to ensure the binder doesn't get tipped upside down, and when flipping pages, I have to do so slowly so I don't fling minis. The upside, takes up very little room, and travels well. I keep a bunch of the plastic bases in a pouch.