1. Don't do damage intentionally.
2. Don't alter files other than than to hide your presence or to remove traces of your intrusion.
3. Don't leave any real name, handle, or phone number on any system.
4. Be careful who you share info with.
5. Don't leave your phone number with anyone you don't know.
6. Do NOT hack government computers.
7. Don't use codes unless you HAVE too.
8. Be paranoid!
9. Watch what you post on boards, be as general as possible.
10. Ask questions...but do it politely and don't expect to have everything handed to you.
First please read " The Meaning of `Hack' from the Jargons Files.