There's really nothing worse than sending out an important e-mail with mention of an attachment then forgetting to actually attach the file that goes with it. To that end, a brilliant new Gmail labs feature is an opt-in nagger that will give you a warning pop-up if you try to send without a file and have used the word "attached" somewhere in the message.
It's not a perfect system. For example, if you say, "I've put the files in this e-mail" or "included in this message" it won't warn you. … Read more