I recommend you to focus first on these categories:

- Directory, Local, Review Sites, and Social
- then Deal & Coupon

Aim to 10-20 links per month (not more than that, it's not a sprint, the goal is to have a consistent growth of referring domains and not one big spike and then a flat line of nope).

When you're done with these easy opportunities, you should aim in priority for the Lv5 & Lv6 opportunity.

In Lv1, the "High DA Profile" are the least powerful backlink and should be used as a last resort.

I need to write a guide about these categories: Bookmarking, URL Shorteners, and Article Submission.

But in a nutshell, the strategy for this should be to submit some low-quality articles to the "Article Submission" service (the article linking to your money site),
and then try to do some social bookmarking to this post with URL Shorteners to give some juice to these articles.

This is worth doing only if you have already exhausted all other options; I would not waste my time with that before trying everything else first.