I've had great fun researching my ancestors from New England. Published town and family histories, combined with published vital records, have furthered my research. But there's more to research in New England than printed materials. Probate, land, and court records can add a great deal of flavor to what's in the published materials--and their use in some situations may indicate that what is in print is not correct?
Are you only using information someone else has compiled when you compile your tree?