I just ran across a great article on the official Gmail blog about how to create disposable and filterable email addresses in Gmail. I thought this was a great feature and decided to share. I personally have been using this feature for ages to be able to easily filter where my email is coming from. For example [email protected] would also arrive at my email address. The benefit of this is that I can then setup a filter to automatically archive and file these messages appropriately. Picture below is a good example from Gmail.
Pretty cool if I may say so myself. Read the full description on the Gmail blog.
The main things you can add to your email address and still get your mail are periods and plus signs. Gmail automatically disregards them.