MOTM

Hi all,
I'm about to go to Staples and look for some easily-reversible 
strips/stickers/whathaveyou to use in visually separating my MOTM 
modules.
I seem to remember some talk of this years ago... just wondering if 
anyone wants to share their findings before I jump in. It doesn't seem 
to difficult to find something, but maybe others have had more success 
with one approach over another...
Thanks.
---Ben