Would you like to make your website easier to preserve? Here are some simple steps you can take.
Maintain stable links.
(Change URLs only if absolutely necessary, and if possible redirect from the old URL to the new one.)
Use one link for each resource.
Use meaningful web addresses.
Don't rely heavily on Flash.
For more information, see the Columbia University Libraries' Guidlelines for Preservable Websites (quicker tips) or the more in-depth Stanford University Libraries' Archivability pulblication.