Remember that each generation doubles the number of ancestors. It's easy to get lost if you don't plan ahead for your trip. Focus on one or two families. The others will still be there when you get to them.
The 1930 census lists military service in other wars: "Sp" for the Spanish-American War, "Phil" for the Philippine Insurrection, "Box" for the Boxer
Rebellion, "Mex" for the Mexican Expedition, and "WW" for World War 1.
When looking at deed indexes, be sure to look at both the "Grantor Index", an index to those selling the land and the "Grantee Index", an index to those buying the land.
STATE Land States are states that owned and distributed their lands. This includes the original 13 colonies, Kentucky, Maine, Tennessee, Vermont and West Virginia, Hawaii and Texas. They use "metes and bounds" to survey the land.
The Family Group Sheet identifies a couple and their children. Everyone with a spouse or child has two group sheets; one as a child with parents and usually one as a parent with children.