windows server/exchange 2003 best admin practices

I am looking for something like a checklist (or 2) giving me a series of best practices for administering windows server 2003 and exchange 2003. That is, how often should the machine be rebooted, how does one deal with ms-updates the may break particular server side processes, how often does an exchange server need to be backed-up? That sort of information. I find piecemeal answers concerning particular aspects of security or backups for particular types of machines but nothing general and basic. Maybe I am looking for a FAQ somewhere or a forum, I just don’t find it.