Ever wondered how Twitter accounts send you automated welcome DMs when you register to their account? Well now you can learn to do the same!
You simply need to use the Twitter application SocialOomph, which used to be called Tweet Later.
Once you've registered to the service, you just need to add a Twitter account. Then you'll have the option of creating your own welcome message for new followers.
And a little tutorial video:
For more info on Twitter, please see Twitter: how does it work?