I keep some of mine in a cabinet on shelves. Shelves are numbered by column and row. I then can stack about 4 molds per column. Next I have a sheet on one of the shelves that has a list of every mold I have. On this sheet, each mold has the mold model number and name along with a column number and a shelf number. If you are very meticulous on where you take them from and where you put them back, the sheet works fine. The mold will always be found where you put it back last time. I also keep all my mold model numbers on a spread sheet.
The ones I use regularly, I also keep on a shelf in a box. The box has the names of the mold I have in there. Also in these boxes, I keep all my football molds together in one box, all my round molds in another and all my spinnerbait molds yet in another. This all works for me.
I'll take a pic later tonight.