Start a tree with yourself first then your parents and grandparents, greatgrandparents and so on. Talk to relatives first to get as deep as you can and collect vital statistics like birth, death, and marriage dates and places. When you run out of info from living relatives move on to historical societies and Internet searches. Ancestry.com has a ton of records but it is a pay site, they do offer free trial subscriptions. Family history is never ending and always growing. It can take some hunting, but some census information is online and free. Census information can give you your Grandpa at age two and his siblings and parents, then continue collecting data and working your way back through history. Start by Googling "family history, or ancestry" and you will quickly pick up tips and pointers. Remember there are some places(states,counties) that will have more information available online than others. Don't forget to check out your family cemetery.