4kb Intro Kit
This is a bit old -- it was released by the Northern Dragons demo group, but it's still an useful resource for someone who wants to break into the "demo scene". :)) It contains useful tutorials, examples, which can be useful even for those who are planning to make a 64k intro, or why not a "demo" which can be up to 16mb :)
I definitely found it useful -- so greetz fly out to Northern Dragons :))
... oh yeah -- you can get it here.