Gmail Witchcraft

Say your email is you@gmail.com. If people are giving that out or things get hacked, it's über difficult to trace.

So… you can append '+' with any word to the first part ('you' in the above example), and it'll still be delivered to you. So as your uber email, you could try you+uber@gmail.com. You now have unlimited sibling addresses for anything, making it a cinch to track spammers, et cetera.

P.S. I hear this is just for Gmail, but I just tested between two Zoho accounts and it seems to work…