There are three types of wills: Attested, Holographic and Nuncupative. The attested will is the most common and is prepared for the testator. A holographic will is written by the testator himself. A nuncupative will is the deathbed wishes of the testator, recorded by a witness present at the bedside. All wills must be witnessed.
Digest everything that is recorded on the census, not just a name and a date.
There are various types of deeds to property. The most common are the warranty deed which transfers property with assurance of good title and the quitclaim deed which transfers one person's interest in the property without guarantee of good title.
The Research Log is very important for the time when you share you data or decide to publish your work. You will need to know your sources for obtaining each piece of information. Be VERY specific with your information quoting authors, titles, pages, publishers, etc.
[Sources & Evidence]
Consider using video tape for your interviews. Those being taped must approve this type of interview.