The good news is, once you reach this point in the process you’re likely to feel energized by all the ideas and thoughts you’ve uncovered in your research, and you’ll have a clear direction because you’ve taken the time to create a thesis statement and organize your presentation with an outline.
A single main point doesn’t have to be kept to a single paragraph, especially if you are writing a relatively long research paper. Main ideas can be spread out over as many paragraphs as you deem necessary.
Any information that doesn’t fit within the framework of your outline, and doesn’t directly support your thesis statement, no matter how interesting, doesn’t belong in your research paper. Keep your focus narrow and avoid the kitchen sink approach. (You know, the one where you throw in every bit of interesting research you uncovered, including the fungal growth in the U-joint of your kitchen sink?) Everything you learn may be fascinating, but not all of it is going to be relevant to your paper.
The body of your essay will revolve around the ideas that you judge to be most important. Go through your research and annotations to determine what points are the most pivotal in your argument or presentation of information. What ideas can you write whole paragraphs about? Which ideas to you have plenty of firm facts and research to back with evidence? Write your main points down on paper, and then organize the related research under each.