Well if you have any specific questions feel free, but the basics of routine maintenace are:

1) Filters
2) Cleaners to eat away the bad stuff (IE seafoam and lucas)
3) Ignition (plugs/wires/rotor/cap)

In that order.

If you take care of all those, you can eliminate those potential problem sources (like a clogged air filter, old spark plugs, worn spark plug wires, etc) and avoid spending hundreds of dollars on things like valve adjustment if you don't even need it. But you probably do if you've never had it done. I'm at 220k and my engine still sounds like new...just keep it well lubricated and make sure air can enter the engine efficienty, combust with gasoline efficiently and exit quickly