All about maintenance

So I have a '96 Tacoma Ex. Cab V6 5-Speed with 181,XXX miles on it, I recently just replaced the oil in my rear differential, front differential, transfer case, and transmission. I also lubed my driveshaft, changed my spark plugs, and cleaned my throttle body and MAF sensor.
I was wondering what other preventative maintenance I should do? I want to do my timing belt next, but what else should be replaced or done while doing that?
I love this truck, it's lasted 15 years, I want it to go another 15.
Thank you for your help.
- Josh

 

Please?

 

Flush radiator, flush Brakes, flush PS, air filter, plug wires, flush clutch master/slave, fuel filter, PCV valve...all i can think of now.

 

Change the water pump and the idler pulleys while doing the timing belt since it is all easy to access at that point.