Just install Multiple Inbox, Undo Send, and Chat on Right Side from Google Labs
I just installed Multiple Inbox option Undo Send, and Chat on Right Side applications for GMail from Google Labs. I love the multiple inbox so fart the coolest part of the multiple inbox is that I can combine two labels and bring it in as inbox. If you are wondering how to do this, After Installing Multiple Inbox, got to settings and combine two label names with "AND operator just like this: is:LabelA AND is:LabelB.
I tried to do a Undo Send by sending an email to my own account but it was I was two late since it gives you only few seconds after clicking the send button.
Chat window on the right is something i was looking for a long time, and Finally it has arrived.