greplin is killer, saves me time always
Sometimes the native search in Gmail or Google Docs is fine... For all the other times, there's Greplin. Great to be able to search across multiple services (evernote, facebook, delicious, dropbox, twitter... and on and on!). You get a good chunk of search indexing for free, and can pay for even more. And it's a fast (and well organized) search! Think spotlight for the web.
Excellent recommendation from a person I follow. If you're like me at all, you have dozens of online email and networking accounts. Trying to recall where you saw that "one thing" can be tiresome and frustrating. Viola! Greplin gives you a kind of clearing house for your online IDs....if you can remember all of them.