I personnaly feel that for the most part the maintenance schedule is in your manual.
There is one caveat to that, however. There has been much debate on this forum about engine oil and filter changes. I personally believe that this is one area, where surpassing the frequency indicated in your owners manual is necessary if you wish to achieve ultra high mileage. For the typical owner who drives the car five years or 100,000 miles, the factory oil and filter frequency is more than adequate.
Have a great day,