Some marketing sites for authors

Just came across some websites that I think will be useful to authors looking to do a little self-promotion.

The first, called Social Media Examiner, has a ton of interesting advice on how to use social media for building your business (your *ahem* platform).

The second, called Tribal Author, promises to help you 'build a worldwide tribe of die-hard fans, evangelists and influencers..." I don't know if it can deliver all that but they seem to be thinking the right way.

Give us some feedback if you find the sites useful...or flaky.