You may need to review your sources again, someone may want to verify your research, your work may imply something to someone who will need to access the same records, or someone may need to pick up where you left off.
Almost invariably it is best to work backwards, from known information about already-identified ancestors, in seeking their ancestors.
This study is undertaken by many people out of interest in their personal and family origins.
As a hobby it can become pleasantly addictive, at least to the person concerned.
If you have the means, video-tape or audio-tape your family members as you interview them.
This will allow you to capture their accents, some of their mannerisms and emotions as they respond to your questions.