Gary Hayes has published a great photo summarising using various Web 2.0 social networking modalities to promote ideas to a wider audience. A small version is here (copyright Gary Hayes under Creative Commons licensing):

Gary suggests that the steps to success in social networking media are to:
- INVOLVE – live the social web, understand it
- CREATE – make relevant content for communities of interest
- DISCUSS – if there is no conversation around it, then the content may as well not exist
- PROMOTE – actively and respectfully promote the content with the networks
- MEASURE – monitor, iteratively develop and respondĀ
Nicely summarised Gary!