I finally got around to making a list of the maps I have. There have been a few times when I wanted to make sure I had a map for the upcoming weekend's hike and couldn't remember if I had it.
I use Greentrails maps most of the time, so I went to their web site, and simply cut and pasted the listings for Washington into a spread sheet, checked off the ones I do have, and then converted it over to my Palm PDA using Quick Office. I made columns for plain paper maps, laminated versions, and a notes column.
You could do the same thing with Word or even Acrobat if you have access to the software.
BTW, laminated maps are worth the expense and saves the weight of a map case.