Still on vacation, but I'm back to bestow another worthy link on your eager eyes. This week's tip is all about reverse search: the process of using a definition to look up a word. Sometimes this is useful just because you want to find the right word, and all you're coming up with is approximations. In searching, this is especially important--particularly when you're dealing with Google. Google returns so much information that having just the right word can make your search that much better. Instead of racking your brain for synonyms for a particular word or concept (especially in a subject you're not that familiar with), just do a reverse lookup search and your problems are solved.
For more information on how to conduct one (and what tool to use), check out this post by a Google exec: http://searchresearch1.blogspot.com/2011/07/using-reverse-dictionary.html