1. A long length / coil of roofing grade copper wire (building supplies - for holding slates), this is used as a heavy duty heat resistant fix for loose things and broken exhaust hangers.
2. Duct tape / Ducktape - the handy man's secret weapon!

3. A pack of assorted fuses in various ratings (and at least
two that are
higher than any rated fuse in your car - use only as a last resort to get you home, but not risk a fire).
4. A length of insulated cable capable of at least 15A, and at least as long as the lenngth of your car. Use for emergency electrical fix / bypass.
5. A tube of 5 minute epoxy glue. Change out every couple of years if not used.
6. A tin of "Tyre Weld" or similar puncture repair in a can. Useless for split side wall on tyres though - make sure the spare is good!
7. Assorted screwdrivers, hammer, vice grips and wire cutter pliers. For fixing / bodging stuff....
8. Several strips of metal with holes drilled along length (think Meccano parts) and a large bunch of self tapping screws. Temporary fix for broken body panels and other impact / crash damage. Good enough to get you home safe.
9. Some form of battery pack for starting or charging a weak car battery. A DIY pack of 10 series connected 1.5V Alkaline AA size batteries will charge a battery that is too weak to start the car (but not a dead battery). Duracell batteries can last in excess of TEN YEARS, so no worries about it self discharging with age! Trust me, you WILL need this device at some point...

10) And finally ; A cheap foam camping mat - for wet or stony ground and prostrate under car repair action. You WILLL thank me for this one!
