One of the things I stress a lot is the need to check original documents. And yes, I know that is not always possible, but it is in the vast majority of cases. There are two huge reasons for this. One is so that you have evidence to back up your findings. The other is to help your research: no matter how well you phrase your online search, you often have to rely on a transcription that somebody else made which may not be accurate.
Take my search for Henry Dodwell, for example. I had to be able to find him in the 1891 census, for example, right? Actually, that was a resounding No until I started researching his brother Walter George Dodwell. 
Here is the actual census entry for Henry from the 1891 census for Cheltenham. Notice that there are three people living in the household. What I want you to do is to look very carefully at the census and try to transcribe it for yourself before reading further. It’s good practise, if nothing else. Once you’ve done that, read the rest of this post.
So, how did you do? I think it reads “Henry Dodwell son married 31 Sergeant Royal Marines born Cheltenham.” Obviously I have expanded the information a little, but that is essentially what it says.
So, how did the big four family history research sites do? Not one of them got it right. I’d be hard pressed to say which one of them did the best job. Now, admittedly, it’s an old style of writing, and the age is easy to misread, but a son born when the father is only 2 years old? At any rate, here are the results, and I will leave it to you to judge for yourself. I think I might go with Ancestry if only because they are the only one to get the age right. I’m just glad I looked at the original.
Here’s Ancestry: at least they got the age right, and the place of birth, but Harvey? And no occupation in the search results.
Here’s Find My Past: right name and occupation, wrong age, and incomplete birthplace.
Here’s FamilySearch: right name, wrong age, incomplete birthplace and no occupation.
And finally, My Heritage: wrong name and age, no occupation or birthplace.
Prestbury, Gloucestershire in 1856 when he was a widower aged 36. I also knew from the 1861 census that he was born in Burford. Finding his christening there on 30 April 1817 was easy enough. It even confirmed his father’s occupation, which has helped to trace the family line through 4 generations.
staying with a previously unknown sister who was born in Stow (or Stow-on-the-Wold) in Gloucestershire. The birthplace, age, and occupation for Edward matched, so I knew it had to be correct. (Incidentally, I still don’t know who Harriet is.) Once I had narrowed down the likely parish of marriage, the rest 
was relatively easy. Lo, and behold, the marriage between Edward Taylor’s parents. And the marriage entry even has their signatures!
make out exactly what the words are. Well, the first word, at any rate.; the second is clearly “weaver.” I’d like to say “stocking weaver,” but that first word looks more like “hockery” or “slockery.” “Hickory weaver” would make sense if he wove hickory into sections of fencing, but that still doesn’t look right. End result? I have no idea what this occupation is. Now, part of this is simply the difficulty of reading old scripts, but I just cannot work that one out at all.