cleaning old video games contacts!
Cordless phones, too! This is my first step if I feel it's not charging well -- clean the contacts and try charging again.
I also clean my glasses with alcohol; contacts don't work for me, so I'm in glasses all the time. (Need new ones, but that's a different story....)
Wipe down tricky spots on mirrors, sanitize toilet/tub/sink/door handles if I'm out of lysol or just don't feel like going to the other room to get it.