I started working on my family genealogy, Carson/Blake/Kee/Renfro, in the 1960s. My father, Donald Kee, left me a very detailed paper tree (multiple pages) on my family after he researched Bibles and did in-depth interviews with all the older generation.
I have been working on Pool/Davis/Moon/Ross genealogy since back in the early 1980s after interviewing a number of my husband's family, getting birth & death certificates and looking at Family Bibles.
I find that the memorials are a wonderful place to enter not only a bio and family links but to tell an interesting story about that particular person that otherwise might not ever be heard.
Researching cemeteries has been a great asset for all of my research and especially online records such as Find-A-Grave. However, I feel you should confirm each piece of information with other pieces to put together the whole picture.
I use birth certificates, death certificates, draft registrations, census, Bibles, cemetery records and family accounts to complete each and every member of our family.