Know your social-media sites. Here's a summary list:

Audioboo
Blogger
CafePress
DeviantArt
Facebook
Flickr
Google
Instagram
LinkedIn
MySpace
Orkut
Path
Pinterest
Reddit
Skype
Slashdot
Slideshare
Snapchat
Spring.me
SoundCloud
Tumblr
Twitter
Viadeo
Vine
WordPress
YouTube
Zazzle