Quoting spooling92vr4:
Used to have in my eclipse at all times. spare ecu, coil pack and transitor. small husky socket set w/ spark plug socket and long extension, 10,12,14,17,19 mm gear wrench, pliers, cutting dikes, 4 in one screwdriver, electical tape, some wire, gloves, tire worms (plugs),oil, extra set of spark plugs and zip ties...
and thats driving around town.
+1^^ and also:
Extra set of front pads, Brake fluid, slave cylinder, 2 or 3 hammers, all my timing tools (you never know when you might need to do a repair for someone if you travel) at least 1 extra alt belt, fuel pump relay, a small go-jo can full of misc. bolts & nuts, a few extra lug nuts, a test light, analog multi meter, and some extra wire incase, and flashlight's everywhere!
But then again, this is probably why my fuel economy was so poor!!