I use a letter/file holder from the office supply store for the big ones and keep those on my cutting table.
Small/specialty ones I keep in ziplock bags with their instructions and store in a clear/plastic drawers that I buy from Walmart. There are 3 drawers to a unit and they come in different sizes. Best time to buy is right after local colleges have started for the new school year.
this is similar to what I have for my larger rulers:
http://www.amazon.com/Fellowes-Deskt...ef=pd_sbs_op_2