I couldn't agree with Matt More!!!

That is a great explanation of what tiered link building is, but the key is that no matter how well you execute on your automated link building you can rest assure that one day maybe not even in the near future Google is going to send you that webmaster tools penalty notice that you don't want!

There are many pro's out there getting penalized the idea that someone relatively new to automated link building is going to execute it flawlessly with out any penalties, over the long term is not too likely.

That being said there are link acquisition tools like Ontolo(prospecting) Buzzstream (mainly task assignment, record keeping and some prospecting) that can be used with Open Site Explorer that can be a powerful means to build links in a much more natural way. Yes you may have to do some forum. commenting, profiling, sharing, bookmarking and guest posting. But if your really want it and want it long term there's going to be some hard work involved.

I would stay far away from SENuke

Good luck.

Your social media is going to be no-follow as Richard pointed out so don't worry about it. however if you do stumble across a do-follow social media account you may have a problem. Pinterest was at one time a do-follow site until it was spammed heavily. I'm not sure if even a do-follow would prompt duplicate content but  would just make sure if your putting similar content up that its on no-follow platforms and that it is relevant.