funny... but true
NO software... if your website is clean I mean, because if it's already spammed you might as well go 100% spam with it
For tier 1 you need quality backlinks from websites that....
- are ranked in google;
- get decent traffic;
- (optional) are somewhat related to your website's niche;
- have quality backlinks themselves (from trustworthy websites, preferably popular sites in your niche);
- rank for a lot of keywords;
- have lots of RDs (Referring Domains);
- have low OBLs (Outbound Links);
- your backlink is placed within content, not on the sidebar / footer.... although, sometimes sidebar links are good, too;
- is d0follow.