Useless Information...
Useless information is wasted space. The bulk of your information should be useful and necessary to the understanding of your discussion. You should not go off on tangents in your discussions. Take a very narrow and precise path to your end result. Fewer words are usually better. By no means should you omit anything that is necessary. Don't go overboard and leave out something that is important or even vital.
Current information is very important. Check your hyperlinks to see if they are still taking people to the proper pages. Having the same information on a page for a long time is not bad. Just make sure that the information is still accurate.