I know you have plenty to read already, but...
Rae Hoffman, aka Sugarrae asked several well known link builders to do a group interview on link development. See Five Link Development Experts: A Group Interview. The results are surprisingly candid and varied, yet share a common thread.
The Yahoo! Daily Wire, which was an email newsletter that included Yahoo Picks, New & Notable Sites, Full Coverage and Daily Entertainment news has announced it will stop being delivered via email sometime this month. The notice can be seen below.
You have by now likely read many collections of rules related to best practices for social media optimization.
Remember the tale "Villiage Wine", where nobody thought their little bit of wine would be missed from the town festival? Then nothing but water poured forth from the cask on festival day...Social link spam is a similar thing in reverse. My few social self-diggs etc. wont affect things, so why not..?
Be very clear with your request for reciprocal linking. After you have thoroughly researched a potential site to ensure they are appropriate and actually do have links to other sites, consider the following:
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