First Resource.

[lukevanoort]

If it is robotics related (and sometimes even when it isn't) a search of Chief Delphi is the first thing I do. If that fails, or if the question isn't of the type found on CD, like something about the production of cheese, I use Wikipedia. If I need further detail than the Wikipedia article offers, I use the references from the Wikipedia article (For example, I located this great site through the Wikipedia article on 'Coilguns') If Wikipeda fails to provide an answer (very rare) I tend to use Google. I have a few good reference books lying around (like a basic electronics book from '65), but those are often harder to search for the odd little tidbits I'm curios about or small things I tend to forget (like resistor colour codes). However, the books tend to be better written, making them far better than Wikipedia for learning new things.