Write original pages, make original graphics, and claim copyright on them.
Link to another web page that does not belong to you, as long as you do not claim it is yours.
Use graphics files that are noted as "free", such as graphics from a "free backgrounds" page or "free icons" page.
Use someone else's graphics with their permission.
Express your opinions upon someone else's web page, on your page, as long as no material from their page is used in your page.
(You must realize that if you do this to them, and they don't like it, they can do the same to you.)
Things you can't legally do:
Take someone else's web page and/or graphics, unmodified, and use it on your server.
Take someone else's web page and/or graphics, modify it, and claim ownership upon it.
Take someone else's graphics files, such as backgrounds, pictures, etc., and use them in your web pages.
Post or use any copyrighted material without permission of the copyright holder; examples are text, books,
magazine articles, pictures, music, etc.
If you didn't create it, and it's not in the public domain, chances are you can't use it.
A lot more. Click on the link below to find out more.