One of my favorite tools for tracking individual ancestors is a timeline. It makes it very concise about what info is missing and what the order of things is.
I also like to include world or country events in my timelines. Things like a war can mess with a family history (large gaps in children's births for example). Sometimes it can explain why your family moved to one place or another, or immigrated across the ocean.
It can track migration patterns, and lead you to know where to look for other missing information. Also, you can combine the timelines of different ancestors and see how your family ended up together to eventually make you.
They also make great scrapbook pages for a family history album, since they are easy to read summaries of someones life.