My uncles been tracing the family tree for years now! And is nowhere near the end! lol!
He goes around to alot of churches and checks gravestones and books there (births, deaths and weddings book), and also heads to the offices in London where all birth and death certificates are held (cant think if its name at the mo!), but also uses the sites mentioned above. Its alot of leg work and can cost abit when requesting copies of certificates, but well worth it in the end! so far hes got back to something like 1749!