Hockey Puck, Hockey Stick Grips (poor kids version), Use to tape quitters (socks that don't stay up) around your ankles when you roll out of bed late and grab the wrong pair of socks, same thing when you have a long sleeve t-shirt and the cuffs are quitters-won't stay down, color code anything, certified grounding program for extension cords, tape off breakers (non-OSHA, but I don't want to hear it), in high school we used a certain English teacher would send us to metal shop to get electrical tape to cover offensive language on our shirts, tape up open reels of wire/cable-LEAVE ME A TAPE TAB!!!, tie a drag line and throw through bar joists, just throw a roll at your partner for fun, tape up the end of a tube of caulk, run a roll through the wash (about once a week here, have to have clean tape), bundle loose 1/2"-1 1/4" PVC, tape the mirror cover on the visor of my truck after it falls off going down the highway and won't let the little vanity light shut off (on the way to a trade show, no less). put pants on wirenuts once in a white, see who can roll their tape the farthest, re-identify a conductor, tape a light switch off (use white or other color to avoid leaving residue). take a roll from the gang box/job trailer every time you go there so no one else has any (happens to me all the time).
And my all time favorite: Take your co-workers jacket, turn the sleeves inside out, tape the crap out of the cuffs, then turn the sleeves right side out. sit back and watch the show as your partner freaks out trying to get their arm into the jacket. One guy I worked with ripped the sleeve off of his coat-names changed to protect the innocent, and kids, don't try any of this fun stuff at home or on the job. But if you do, report back here immediately so we can hear all about it.