Keep a research log.
Read that again. Keep a research log.
Keeping a research log is one of the most important things a genealogist can do. Hobby or expert, this is something that every family historian should be doing. There is no one item that goes further to organize research.
A research log is a simple document that allows you to make note of the places that you look for records. It helps prevent you from wasting research time by looking for the same document in the same place.
Each research session should begin with your research log and a research plan. With this strategy it will be easier to get the most out of every research session.
Here is a free research log you can use to get your started!