You didn't say if you just acquired the car or have had it a while so assuming it's new to you... A tune up is nice. While you're in there doing the water pump and timing belt, replace all the belts, hoses, filters, fluids, cap, rotor, and wires, and thermostat. If the radiator is the least bit questionable, replace it. It's easier to do most of the above with it out anyway.
Check (replace as required) Tires, brakes, U joints, suspension bushings, shocks, rod ends, motor and tranny mounts, exhaust system.
Go through the fuse box and clean the corruption off the fuse sockets. Get some extra fuses.
Put a headlight relay in it. The headlight switch in my '83 failed one night as I was leaving work. Drove it home on the high beam flasher. If it had crapped the prior weekend, I'd have been spending the night in the desert.