Quite a few of our correspodents seem to be more computer- and web-literate than I, and have demonstrated and given instructions on how to do some pretty useful things in the middle of some other threads. Would you kind people please summarize here the commands to:

Put in a hard break.
Put in tabs or indent part of a message so you can lay out verses and choruses of songs in different chunks.
Put in a link to another web site.
Include HTML characters like the right and left arrow brackets in a message so one can illustrate the command without actually executing it.

Obviously I have learned a few of these tricks, but I thought it might be useful to have someone who is able to explain them put the instructions all in one thread that we can all cross-reference back to - either that, or suggest a good text where I and other net-neophytes could go to learn this stuff. Is there an "HTML For Dummies"?