As you know, I advocate making good notes of the results from your searches, but I am now also advocating something else. I think that you should keep a log of what you are searching so that you can pursue good searches and eliminate dead ends.
I found an excellent search via great notes a couple of weeks ago. There was a lot going on in my personal life around the end of January, so when I found this really amazing link, I made notes, but I was unable to bookmark the link or I flat out did not remember to.
When I was looking in my history for a website, there was the search from January. I went through the entire history of searches that went back for a few months and made some really diligent notes.
I discovered that my mind is not a steel trap like I tend to think of it. One search term I have looked up every weekend for about 4 months.
Now, by making notes, I am able to continue where I left off, rather than searching like a tumbleweed.
I also am noting the search engine that I use, and so far, I am the most impressed with google, followed by bing.
Save your searches!