The Pill. Man I thought this was bike related stuff. Wow so many to choose from...Duct tape, tie wraps, JB weld, mono shock, FI for bikes (can't wait for FI 2T bikes) But all said and done at my age it has to be the Magic Button on my 510.
I forgot about the Porcupine Head for the air cooled bikes, chain tensioner, layed down shocks, reservoir shocks, air caps for the forks and sure was glad to go from my hot Bates leather pants to the JT's. It was always a bear to get your knee and shin guards in them.