Now that you’ve got a paper written, take a moment to congratulate yourself. You have done a lot of work to get to this point! And then, get back to work. You still need to edit your paper before it’s ready to turn in. Remember how you weren’t supposed to worry about being perfect? You still don’t need to worry, but it is time to make your paper as perfect as you possibly can.
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.
If you want to find helpful and reliable sources of information, the library is literally the best place to look around. There are numerous books, published articles, journals and etc. that you can choose from about your chosen topic.
Next, find reliable resources. Although this may run contrary to what you’ve been told, you can use Wikipedia to write a research paper. But, you cannot use that as a final source. You can use general sources like Wikipedia to get familiar with a topic, find keywords that can further drive your research, and quickly understand large amounts of information. But, for the information you use in your paper, you have to find reliable resources.
When you’re finished with your final paper, do the final adjustments as needed. Read it as many times as you want and even ask a friend or professor to go through it and give out their opinion.