Those first 4 categories will be of most help to you for now: View Ads, Surveys, Offers and Tasks.
My earnings increase noticeably if I focus on doing surveys. Some folks get discouraged because occasionally you will finish one and not get credit or you may be rejected almost as soon as you start. However, in the long long, by being persistent you will earn more from these. Surveys can pay as much as $4 each.
Under the Offers link above, you will see a category called Peanut Labs. This gets you to more surveys. There is also a link called Adsense in the Offers link and that can geet you to surveys.
Go exploring. You will find your favorites as well as a few that you may decide to avoid.