Now that I've discovered how easy it is to have an assortment of zip ties around, and how invaluable they are (for example, with my helmet mounted Take A Look mirror), they've been added to my list of indispensables, like duct tape and WD-40.
If it moves and it shouldn't - Duct tape.
If it doesn't move and it should - WD-40.
If it falls off and it shouldn't - zip ties.
What else belongs on this list?