Generally, there should be very little maintenance necessary for Tiger.
As Klaus mentioned, run Repair Permissions after install and updates. Also a "Verify Disk" before updating
The system runs periodic scripts to clear log and cache files in the wee hours each morning. If you do not leave your Mac on 24/7
you may want to run them manually now and then.
Also, there is usually
no need to optimize or defrag in OS X.
In short, the less you do, the better. Unless you have a specific problem.
-mj
macjack@gmail.com
Message was edited by: macjack