Step 1: Requirements
B. Empty marker
C. Wood screw, washer, screwdriver
D. Charmain Ultra Soft Mega Roll ( I'm a Costco shopper )
Step 2: Bend Ruler, Empty Marker
Take the back cap off the maker and remove the ink cartridge. This might not be necessary, but I already had an empty marker from a different project.
Step 3: Screw and Mount
Now find a shelf type ledge to tape it up.
Another more elegant way to mount it is to tape down a couple 1/2"x1/2"x1/32" magnets down the length of the shelf . The ruler will then hang from the bent portion and cling to the magnets.
I use my toilette paper roll for anything I need to wipe up: spilled super glue, cereal, anything really. I don't actually use it for it's typical use though, hmm.