If you use both Twitter and Facebook, you can save a great deal of time by using Twitter to update your Facebook status. That way you can communicate via both services with only one post.
1. Go to Facebook and login to your account.
2. Go to http://apps.facebook.com/twitter/.
3. Click the Allow button.
4. Input your Twitter Username and Password in the appropriate textbooks.
5. Click the Log in button.
6. You will now see a page similar to your page at Twitter, displaying your friends’ tweets. Go to the top and click the + Allow Twitter to Update Your Facebook Status button.
Now when you post a tweet on Twitter, it will also update your Facebook status.