[ryandrake]

Even without your own email hosting, Gmail kind of lets you do this by appending +whatever to your address before @gmail.com. Obviously this can be trivially detected and stripped but I suppose it is better than nothing. Multiple real Email addresses are definitely a best practice.

[thenthenthen]

Like: [e-mail]?

[rkomorn]

Yep. I do this a lot. It occasionally doesn't work (eg: some sites don't think + is valid).

To be fair, I don't think it's made a huge difference in my life. In fact it's possibly been more of a negative than a positive.