My domain is about 2 years old, and I just noticed that if I search for my company name Google put several links under our listing. Example: I have done 2 things this past month that I think I can attribute to this: #1I've done about 20-30 backlinks for 15 or so Backlinks for my site. These consisted of social bookmarks and blog profiles. Before all my backlinks were to my homepage. #2 I've done about 5-7 EDU/GOV backlinks to each of my 15 backlinks. Most importantly I also think it has to do with the quality of the site. If it has fresh unique content then theres a higher chance of getting them, vs a spammy affiliate site. Hope this helps.