still on vehicles, I am a fanatically light braker, pads and discs last an eternity when I am the driver. (this could be a whole new thread!)
Another good tip is get to know a mechanic. Saves bucket loads.
My next door neighbor is a mechanic, and services my car at his home. Costs bugger all. Normal service is around $85. When brakes are done also, add about $100 on. A major 200,000km service on my Commodore cost about $240. Most of these costs are parts cost. He doesn't charge much at all for labor.
If I eventually move away/whatnot, a good mate of mine is an apprentice mechanic, so he can take over.