My list of OCD items LOL:
1. Change oil every 3k miles (after each 6k, 12k, 18k, 24k, etc. oil change, I steam clean the engine bay).
2. Wash the vehicle thoroughly, even scrub entire wheel wells, underneath side skirts, underside the front bumper (mostly missed by many); also door jams, roof rails, moon glasses, tailgate area; scrub entire wheel and rubber tire walls.
3. Scrub/wipe down door panels, dashboard, and center console w/ clean wipes.
4. Set tire pressures to 37lbs every two weeks.
Hmmm, overdoing it you think?