I would start of by building web 2.0 blogs and posting documents on file sharing websites, you can use tools to automate these like, UD (ultimate deameon), GSA SER, Senuke, licorne AIO, Article kevo, magic submitter. or you could build them manually, post unique content (if you can) to each of them. build a few high PR social bookmarks and even some blog comments on relevant sites (don't spam them, and only comment on sites that haven't been spammed). you could build some high PR wiki links (but most are no follow, and have been spammed to death) or even make some profiles. post your link wherever you can but make sure you use quality content and post of quality sites.
here are two lists to get you started
web 2.0 list
Code:
http://www.blackhatworld.com/blackhat-seo/black-hat-seo/525587-fresh-rare-list-89-high-quality-web-2-0-blogs.html
document sharing sites
Code:
http://www.blackhatworld.com/blackhat-seo/black-hat-seo/528947-fresh-list-32-document-sharing-pr4.html
what I do personally is post unique content on web 2.0 blogs, make some high pr social bookmarks, submit a PDF to file sharing sites, and make a few web 2.0 profiles. I then backlink even more to tier 1, I make more web 2.0 blogs (JCOW, ELGG sites), post to more social bookmarks, post wiki's, and blog comments.
all you have to do is make sure your tier 1 links are high quality and everything will be alright :wiggle: