1. confirmation bias
2. WHY - Motivations
2.1. Express an opinion
2.2. Social Definition
2.3. Connect with community
2.4. Social Promotion
2.4.1. profit
2.4.2. notoriety
2.4.3. Social Capital
2.5. Tit-for-tat (as in sharing via bittorrent)
2.5.1. What supports this activity? Why are there so few leechers in some systems? leechers?
2.6. Altruism
2.7. Dislike / Desire to disrupt & harass
2.7.1. Flaming
2.7.2. Online bullying
2.7.3. Trolling
2.8. Seek help on a specific issue
2.9. Planning
2.9.1. Events
2.9.2. Travel
2.9.3. Projects
2.10. spread the word
3. HOW - Types of Sharing
3.1. Social bookmarks - Digg, Newsvine, etc.
3.2. Blog
3.3. Add to profile - myspace, facebook, etc.
3.4. Share with individuals in social network - facebook, myspace, orkut, etc.
3.5. Share with entire social network
3.6. Email
3.7. IM
3.8. mobile
3.9. Collaborative Filtering / Rating Systems
4. The choice of the type of sharing is dependent on the motivation and the perceived strength of personal connection
5. Sharing opportunities
5.1. Contextual based on the what
5.2. Contextual based on the why
5.3. Contextual based on the who
5.4. Customized based on previous user behavior
5.5. activities about content - trivia, games, challenges, remixing, etc.
6. Receiving Shares
7. WHO - Strength of connection
7.1. Friend or family
7.1.1. Email
7.1.2. IM
7.1.3. regular social networking sites (facebook, etc.)
7.2. web friends
7.2.1. Share with social net-individuals
7.2.2. Share with social net-entire
7.3. interest sharing friends
7.3.1. Share with specialty networks like Flickr
7.3.2. Flux?
7.4. People I don't yet know who I want to know me
7.4.1. Blog
7.4.2. LinkedIn
7.4.3. My Profile on MySpace, Facebook, etc.
7.4.4. Dating Sites
7.4.5. Affinity sites (are there such a thing? LastFM perhaps?)
7.5. Shared Resource Networks - not interested in the person, but in the information they make available online
7.5.1. File Sharing networks
7.5.1.1. The Pirate Bay
7.5.1.2. TVTorrents
7.5.2. Knowledge Exchange
7.5.2.1. Answer sites - Google, Yahoo
7.5.2.2. Experts Exchange
7.5.2.3. Wikipedia
7.5.3. Collaborative Filtering (maybe this is a stretch for sharing though)
8. WHAT you share
8.1. Type of Content
8.1.1. Music
8.1.2. Video
8.1.3. Pictures
8.1.4. News
8.1.5. Blog Entries
8.1.6. People
8.2. Genre of content
8.2.1. Entertainment
8.2.2. Ideas
8.2.3. Connections
8.3. Type of Info
8.3.1. Message
8.3.2. Link
8.3.3. Event
8.3.4. File
8.4. amount of content
8.4.1. single piece
8.4.2. multiple pieces