Mostly you want to read the "Beginner's Guide" document in the internal SE wiki. Jocelyn Simmonds, Neil Ernst, and I have written a fair amount of useful text there. And it's a "wiki", so you can add to it. Here is information about activating your account on the SE wiki.
That's the only document I have on the web which is relevant right now. If there are other things you'd like me to write, please let me know!
Many things about using CSLab machines and networks can be found under http://support.cs.toronto.edu