If you have ancestors who settled in the coastal areas of California, check out the GenWeb pages for biographies. I have been volunteering as a transcriber of a book, History of the State of California & Biographical Record of Coast Counties, California by Prof. J. M. Guinn, A. M., The Chapman Publishing Co., Chicago, 1904. It's part of the Golden Nugget Library and can be found by a browser search. Per the Golden Nugget site, the Golden Nugget Library currently has online: Social Registries, Articles, Directories, Argonaut Passenger's Lists, Government Rosters, Organization's Members lists, Church lists, 1906 San Francisco Earthquake Photos, 1870 Petitions and Links to Biographies (many works in progress).
Here's just one example: Biography