Micro Gaffers Tape. For those familiar with gaffers tape all this is, is just a small roll that can fit in your pocket. Just an inch wide, seems just enough for most jobs needing tape.
Those not familiar with this tape, you are truly missing out. This is the Duct tape of our industry. If MacGyver was a photog this is what he would use. This is just as useful as duct tape, but does not leave that nasty sticky residue when you pull it off your stuff.
come check it out, it is just 5 bucks a roll