SEO e Linkbuilding [infographic]

Content Distribution

Description: Links from press releases, article marketing, guest blog posts, aggregated links such as RSS feeds
How to Obtain: Write unique SEO optimized content, publish, promote via social networks
Difficulty Score: 1
Quality Score: 3

Blog/Forum Comments

Description: Links from forum signatures, posts, profiles, and blog “signing”
How to Obtain: Search relevant blogs & forum topics, register, create profiles, create anchor text signatures for forums
Difficulty Score: 1
Quality Score: 2

Purchased Links

Description: Links obtained through direct exchange of money, includes directories
How to Obtain: Search for keywords + sponsor, advertise, sponsored by, banner ads, submit URL, add URL
Difficulty Score: 1
Quality Score: 2
WARNING: Use caution, understand the risks, and don’t get caught buying links or Google might take your keys away!

Reciprocal Links

Description: Links from partnerships, exchanges, and trades (use sparingly, stay topically relevant)
How to Obtain: Use only highest authority relevant sites to exchange with, try to do a 3 way instead of reciprocal
Difficulty Score: 2
Quality Score: 1

Social Media/Bookmarking

Description: Links from various social media profile pages and bookmarking tools
How to Obtain: Find top bookmarking sites based on PageRank, Alexa, dofollow and submit website using good keyword anchored phrases
Difficulty Score: 3
Quality Score: 3

Embedded Content

Description: Links via widgets, infographics, badges, and other embeddedable content
How to Obtain: Create visually appealing and useful content, promote via social networks
Difficulty Score: 3
Quality Score: 4

Link Reclamation

Description: Links to no longer available resources to re-point at your pages
How to Obtain: Check Google Webmaster Tools for pages not found, contact websites linking to those to change link or redirect on your site
Difficulty Score: 3
Quality Score: 5

Natural Links

Description: Links gained naturally due to link worthy (viral) content, link baiting, etc.
How to Obtain: Create good, informative content and promote through your networks
Difficulty Score: 4
Quality Score: 5

Link Requests

Description: Links acquired through manual requests from webmasters, site owners, etc.