Stop sent messages being delivered!

Have you ever sent a message and then realised that you made a mistake?  Well, if you do this in Gmail, all is not lost, you still have a chance to stop it from being delivered:

1. Click on ‘Settings’ in the top right corner.

2. Go into Google Labs and enable the option ‘Undo Send’.

3. Click ‘Save Changes’.

Now, when you click to send a message you have the option to undo, but time is limited.  Lets just hope you retrieve it quickly!