Link building... do you really think that new sites, that aren't even in the public eye are picked up by the public and linked to by them for some reason or other..
Mostly I think not, it's quite seldom a new site is going to get this... Therefore, what's natural is to leave your site as is, apart from directory submissions, i.e linking to your front page..
STOP bookmarking your sites, it's not good SEO practice..
STOP building hundreds of backlinks, unless they are directory submissions.
Bascailly, if you want to build backlinks make it directory submissions, this is sub standard SEO..
Then you can later maybe look out for a "top commenter" blog and get placed there..
Or if you have another blog, that is related to your own blog link to it from there, there is no harm in this, as I've just realised, afterall, all you are doing is promoting your site, just because Google count that as a backlink doesn't mean you shouldn't be able to promote your site on another site of yours..
How did I come to this conclusion?
Research and test test test.
Good luck, and take my advice, learn from it..
My main point to you is that Bookmarking, is like saying bye forever to your PR, and rankings.
Then you have onsite optimization.. What's this you say?
Interlinking related material, it's very good practice.. EVERY authortiy site does this.. and so should you.