Daedalus

Wow! Is your wife in sales?

I buy my tires from Costco and they rotate them for free every 5000 miles.
I change all fluids every 2-3 years, except for engine oil, which I change every 3-6 months, depending on the vehicle. I go by time, not mileage, as I only drive about 8000 miles a year spread over 3 vehicles. I have record-keeping software for car maintenance that makes it easy to see when things were done and what's due soon. Excel works just fine too. Just this year I picked up a few MityVac fluid evacuators which make maintenance a little easier. The one-man vacuum brake bleeder is nice.

I don't pay for fluid exchanges (I think "flush" is often misused for these services), so I rely on more frequent changes to "rotate" through power steering, coolant and auto trans fluids, which can't be completely drained easily. E.g., when I evacuate my trans fluid, I only get a little more than 1/2 of the fluid out of the system. Drain and refill 2x and I have about 80% new fluid in there. Do this regularly (every 9 months, depending) and you ensure the fluid is relatively fresh at all times. Exchanging fluids regularly makes a huge difference to the longevity of various systems. Anywhere there's fluid, there are rubber seals, and seals deteriorate in the presence of moisture. I even replace the AC oil and drier every 4-5 years.

There's a hazmat collection center near me, so I make a run down there about once a year to drop off auto fluids, old paint, cleaners, dead batteries, etc. Also, in my state any place that sells motor oil has to accept old oil as well.