One of the best things to do for you car is to follow a maintenance schedule. By doing regular maintenance on you vehicle you keep it running at its best and can also find little issue before they become big issues. Additionally by following a regular maintenace schedule you can greatly exten the life of your vehicle. Almost every vehicle I have ever owned has made it well over 200,000 miles with the exception of my last car which got totaled in an accident at 179,000 miles. I have only had 2 vehicles die and both were cheep junk from the 80's that were in pretty bad shape when I got them but even they made it over 200,000 miles, the others were taken out in accidents but were still running great.
I am frequently asked by people when they should have things done on their vehicle and usually provide the same maintenance schedule I follow. I have attached the schedule here as a Google Docs, OpenOffice, and MS Excel spreadsheets. This schedule is on the aggressive side but will allow for some slack and oopses like not being able to get your oil change right on time.
If you need an office program I would suggest using OpenOffice which is a free open source office suite that is similar to MS Office. You can download OpenOffice here for free: OpenOffice download page