I know I harp on this all the time - but I just can't say it enough. If you are going to spend all that time on your family history research, keep a log so you don't duplicate your efforts over and over again.
Janine Adams recently published a post on her "Organize Your Family History" blog entitled, Why Keep A Genealogy Research Log. Hope you will take a few minutes to take a look! For those of you who are still struggling with this research tool, Janine has started a Facebook group called "Genealogy Research Loggers". Might be worth checking out!