Today I met a relative by pure chance. My Grandfather was the brother of his Great-Grandfather. He still lives in the same area that was settled by my Great-Grandfather. He gave me the address for the house where my Grandfather was born.
Face, you do have ant genealogy advice?
Choose very wealthy, very healthy ancestors who have small families and don't believe in this giving to charity stuff. And they should own a lot of real estate, preferably in places like Texas. That's another important thing when selecting your ancestors.
Actually, talk to the oldest relatives you can find, and their living siblings and cousins, and pump them for information on the names of their uncles and aunts, and maiden names of their grandmothers and where they came from and when. I started in the 1980's, and that information was a Godsend when it came time to piece together Census and other records - or even knowing when to move to other states in a Census.
And never, ever, ever believe anybody else's research unless you've seen the underlying documents.
Full names and birthdates and birthplaces to start. (Always maiden names for the wives) Remember that some places did not issue birth certificates until about 10 or 15 years into the 20th Century.
Look for census records if you need to flesh things out.
You can go to https://www.familysearch.org/ , which is free, or ancestry.com which is not. Either one is awesome. Or, you COULD send what info you have in an email to someone you know who does genealogy for a hobby....