it appears that many, probably new to genealogy, are researching only by censuses (Quote from Gragareth)
It is true that a lot of new folk just starting on there trees do start with their first census usually the 1901 Getting a census is free thanks to volunteers on rootschat.BUT they first have to work the way up there, with snippits of information gathered from family.It is only then they can start sending for certificates to learn more. There is an order of which to do a tree,if you don't do it in order and with thought.You could find yourself in the wrong tree

.I did for three Years,luckily for me i was a bit suspicious about the mothers maiden on the Scotland marriage cert of her son, that i had received, and not having found her anywhere. I never went into it.Three years later it turned out that i was right,the surname had been mistranscribed.So sometimes you cant win can you
Celia