Esp. if you're applying for jobs, you'll feel just like me (and the pig) if you accidentally send that e-mail before you mean to.

Mashable: HOW TO: Undo “Send” in Gmail

I was before aware of the 5-second window I have after sending an e-mail to someone to quickly click “Undo.” But heaven is smiling down upon us Gmail users: a 30-second window exists. Read Mashable’s article to find out how.