Other changes that I've made recently are modifications to my template to utilize a screen resolution of 1024 by 768 and higher. Visitors to this site using a screen resolution of 800 by 600 only account for 0.60% of visits--most visitors use a screen resolution of 1280X1024 or 1280X800.
I've swapped out the previous search for a different hosted solution by Eurekster called a 'swicki'. Although there was nothing wrong with the previous one I used by Lijit, no one used it so I thought, "why not try something new?".
About three weeks ago, I started experimenting with other ad providers. On an average day, I only receive about 100 visits, which is too low for Amazon Affiliates and is probably too low for AdSense. I've started using Project Wonderful and I've been happy with the results so far—we'll see...
Stay tuned...there should be more changes in the near future.