I am trying to come up with a good list of A/B tests that I can do to see what might better a travel based web site group. I thought I would open up to the community and see if anyone has any really good ideas?

Some of my test ideas are:

Title Tags:
Island name vs. Caribbean in the title
Repeating the keyword vs. one time use

Metatags
Revisit every 30 days vs. no revisit tag

Content
Use the keyword (2 per page) multiple times vs. using synonyms of the keyword

Adding images with the keyword in the image file name, alt tag, and related content around the image, vs. no photo

Social Sites
Add site photos to Flickr and have the web site in the profile name, vs. no use of Flickr

Any other ideas out there, I would be very happy to consider.