There is surprisingly little on meta about search, which is a shame because it's the main tool for avoiding duplicate questions. This question asks the way of searching for a particular character, and brings up a tag that only searches within code fragments: code:"...". That particular one isn't on the list of search features accessible from the FAQ on the main site:
http://tex.stackexchange.com/search
Does search have any other little-known features? Are there any particular tricks to using search well? Are there situations where it is better to use Google than the site search?
