Set aside a block of uninterrupted time to mull over stuff.
Scribble ideas down, all of them, related to the project.
Write down important phrases.
Create a document (spreadsheet, Word, Google Doc, pad of paper - whatever works for you) where you keep track of the terminology (keywords) you use for searches and the kinds of results those terms provide).
Try using a concept map to see the big picture of your topic.
