I need a check list.

I am a greenhorn in the administrator arena. I have just been trusted with three servers and 20+ workstations, with very little experience to help with the supposed common practices of keeping an intranet up and running smooth. So far, I have not run into any problems, but I wish to prevent problems before they happen. What can I do? Is there a everyday check list to help infant administrators along in this cruel world we call reality? I am learning more than I ever would as a grunt, but likea grunt I need more instruction. Please help.