Narrow the focus of your questions. It is easy to become overwhelmed by the number of questions that need answers. It's been my experience with genealogy that the further back I go, the more questions I ask.
The key is to identify one person or a few individuals of the same family. Research efforts move forward faster if you focus on one individual and one question at a time. Use your pedigree charts and family group sheets to help identify questions. Make a research plan listing the questions you want to research.