I think what Dorsey is looking for is the necessary preventive maintenance. This can be found in an owners manual or Haynes manual, also the CD is a worthwhile investment.
Such things as valve seals are something you do when the condition of the engine warrants it. Rather than replace the timing chain as a preventive maintenance measure, it would be worthwhile to check the timing chain stretch. If there is no stretch, you shouldn't have to worry about it. If the car has had frequent oil changes, the chain is probably not stretched. If the timing chain horror stories that you read here give you nightmares, it would be worth replacing it any way, so that you can sleep at night.