Besides a tool kit I've found that having that having one of those plastic storage cases with the small compartments in it to keep various nuts & bolts, screws & nails, washers, spare fuses, light blubs, hose washers, small tubes of Crazy Glue or something similar, clips, and anything else that's small, but might come in handy in a situation. Many times I've had whatever was needed in my storage case when a friend/neighbor didn't have it. It keeps things organized and easy to sort through.