Gmail secrets... (Tips and Tricks)

I know some secrets about gmail account and I am very happy to share with all of you. If you know any better tips or tricks please leave a comment.

• Single mail box but different domains: If you have mail account with gmail, then you can associate gmail account with "googlemail" domain also.Lets say you have gmail account with name "xyz@gmail.com" it is same as "xyz@googlemail.com".
  
  Ex:

• Append a plus (”+”) sign and any combination of words or numbers after your email address. For example, if your name was "xyz@gmail.com", you can send mail to xyz+friends@gmail.com or xyz+list@gmail.com or even xyz+myfriend@googlemail.com
• Insert one or several dots (”.”) anywhere in your email address. Gmail doesn’t recognize periods as characters in addresses — it just ignore them. For example, you can tell people your address like, xyz@gmail.com, xy.z@gmail.com or x.y.z@gmail.com or x.y.z@googlemail.com

You can also find same tips here