Trying to rank a SaaS CRM site this is my strategy what do you think?

Hi Warriors,

Looking for some best practice general advice or strategy on how to rank a CRM software site. The goal is to generate organic traffic to the site to encourage free trial sign ups. This is my plan after the on page SEO is complete

1)web 2.0 sites creating original content once per month with anchor text back links.
2)Promo youtube video(s)
3)Press releases (what are the best sites for this???)
4) Guest blogging posts
5) 10 or so article directories with 1 original article added to each site monthly. (what are the best directories to focus on???)
6) Blog commenting on business related subjects.
7) Social media sharing of the various articles videos etc using Hootsuite as the dashboard to organize it.

Questions:

-Does this sound like a decent strategy?

-How should I be interlinking the above?

-What should I be doing differently or adding to this?

-What are the directories eg, blog sites, article directories, press release sites that I should focus on?

-How can I obtain back links from high PR sites?

Thanks to all those Warriors who choose to share their thoughts with me on this it's very much appreciated.