Loads of handy tips & tricks my favorite being the following:
Receiving E-Mails without giving your real address
Sometimes you want to use your GMail address on a website, but you fear you will get a lot of SPAM afterwards coming from that website. So instead of creating another address just for those kind of websites, you can very easily alter your address. if your address is [email protected], enter on the website [email protected]. We will still receive every e-mail, but if the website do send you a lot of SPAMs, you can create a filter for every message sent to this address ([email protected]) to go directly in the trash !
[Link]