Everything you have the tools to do.
Put on the spare tire.
Fuel pump.
Fuel filter.
Alternator. (Delete)
P/S pump. (Delete)
A/C recharge.
A/C rebuild.
O2 sensor.
MAF/MAP sensor.
Exhaust.
Window regulators, motors, etc.
Wiper motor, linkage.
Thermostat. (Put in a higher temp one while you're at it)
Radiator.
Hoses.
Valve cover gasket.
Front/Rear main seals, axle seals.
Clutch.
CV shafts.
Diff swap.
Wheel bearings.
Trans swap/replace.
Engine swap/replace.
Cam swap.
Adjust cam or ignition timing.
Valve seals (without removing head).
Compression test.
Ev conversion.
EGR cleaning.
Big stereo installation.
Cleaning ground connections.
Hack that hybrid.
Electrical diagnostics, wire tracing/repairing.
Cleaning/prepping sealing surface.
Engine rebuild, re-ring, head gasket, bearings, valve lapping, cylinder hone.
Have the phone number of a professional engine rebuilder/machinist handy.
Rust repair.
Dent repair.
Door, window, etc seals.
Replace broken side glass.
Break in to your own vehicle when you've locked the keys inside at work.
Cut your own key from a lock cylinder.
Detail, inside and out, engine and bay too.
"Upgrades".
Shift linkage replacement.
Parking brake cable replacement/adjustment.
Drum brake adjustment.
Wheel stud replacement.
Brake service.
Brake hoses.
Brake bleeding/fluid change.
Shocks & struts.
Ball joints, tie-rods, steering rack.
DIY alignment.
Timing belt, water pump, pulleys.
Timing chain, guides.
Oil pump.
Trans oil changes, filter replacement.
Diff oil change.
Engine mounts.
Intake/exhaust gaskets.
VSS swap/replacement, or speedo gear, cable, etc.
Carb clean, adjustment, rebuild.
Dipstick O-ring.
Washer fluid pump/hoses.
Injector replacement or cleaning.
Idle adjust.
Throttle body & intake manifold cleaning.
Track down leaks.
Diagnosis, period.
CEL "scanning".
Engine & cooling flush.
Dash removal, for whatever reason.
Tire mounting, if you have access to the tools.
Tire puncture plugging/repairing.
Reading tire wear.
Seatbelt replacement.
Seat cover replacement.
Headliner replacement/re-gluing.
Defroster line repair.
HVAC.
Bench to bucket seat swap.
Brake or fuel line replacement.
Gas tank sealing.
Undercoating.
Paint repair or color change.
Install trailer hitch & wiring.
Use a torque wrench, torque your lug nuts properly.
Beat book times.
Find work-arounds.
Extract broken bolts.
Know where your jack points are!!!
Part-out.
Fill out transfer forms.
Buy & sell, preferably for a profit.
Source parts on the cheap, pull your own parts at the junk yard.
Eco mods.
Bite your tongue when people try talking cars.
Do your own research.
Do most jobs with nothing but a list of torque specs.
RTFM.
Buy a Hanes manual, learn the how and why as you learn how to do each job.
Know when you're in over your head and/or to give up.
Keep going anyway. (You can't make it any worse than it already is!)
Probably missed a few.
