bactrack, now what?

I got backtrack installed and working.  Now what?  I've never used any of the tools supplied with backtrack.  Where's a good place to start?

>>3 is correct.

Then you need to learn how networks, client/server applications and all that work. Then you need to determine what exactly it is you want to test for security. Once you know that you need to read up on how exactly they work. After you've done all this correctly, you should be in a position to answer your own question.