In addition to the services previously mentioned, I suggest having the brake fluid flushed. Brake fluid slowly absorbs water and eventually will cause rust and corrosion in the lines, calipers, and ABS system.
Changing the serpentine belt by 150K miles despite how good it looks is wise. These new belts are made with EPDM, and do not show wear by cracking and splitting like the older neoprene belts did. EPDM belts wear more like tires, as the ribs wear down the larger rib gap allows the belt to loose it's grip and slip. http://www.gatesprograms.com/beltwear
Note that the Toyota super long life coolant (pink) is rated for 10 years or 100K miles for the factory fill. But only rated for 5 years or 50K miles after you change it.
Personal observations, I had a 1986 F150 truck for 22 years. I flushed the brake fluid about every 3 years as part of my preventative maintenance. I still had the factory calipers and rear wheel cylinders when I sold it. I also drained and filled the radiator (never used a chemical flush) every 2 years. This is with the old green glycol antifreeze that only had a service life of 2 years. The factory radiator lasted 21 years. The truck never ran hot, even with desert and mountain towing. The radiator failed not due to corrosion, but due to fatigue crack in one of the plastic tanks, causing a slow weeping of fluid. The radiator was an aluminum cross flow with plastic side tanks.