- Fixing typos and grammar errors. No matter how hard you try, they will exist.
- Reviewing content that has drawn questions and determining if something should be modified.
- Adding new information, metadata, or images.
- Fixing broken URLs.
- Preserving the digital assets.
By the way, one idea to consider is to use Java scripting on the homepage so that images are randomly displayed there. That instantly makes a site seem "fresher."
Technorati tag: Digitization