This, Find a Grave, web site has been, and continues to be, a big help in my own genealogical research. I started building memorials for graves in the cemetery where my grandparents are buried. Then I entered the data into my family tree and soon found out that almost all are related to me in some way. Thanks Find a Grave.
The volunteer system is the best, I take grave photos when requested and have had several of my photo requests fulfilled.
If you are related to a memorial I have entered and want control let me know and I will be happy to transfer control to you. If errors are found or family links are to be added drop me a note.