If you have a software or service that build for you links that is great, but if not DO not waste your time on building worthless links. You need: 1. Quality (higher than PR0) backlinks with your anchor text and from related websites. 2. To have some new backlinks every month 3. Links from pages Google visit frequently (at least once a week). 4. Links that are actually displayed to web surfers. 5. Links that get hits are very effective and have higher value than PR those links will help you get better position on the SERPs not increasing your PR