The main difficulty I've had is providing evidence for events which were pre-internet. I created a page about a British computer software company, founded in the 60s and which I joined in '74. It was very well-known and a pioneer in several fields. But there is very little online to link to and the result does not do the subject justice.

I found that one of the trade journals of the day had been digitised so I was able to screengrab a few articles and photos. (I had to justify using copyright material.) But most is or was on paper and some is behind academic firewalls - or even an Official Secret. I had hoped that people I worked with would find and add to it, but that hasn't happened, and many of the potential contributors are now dead.

So if you're creating a page about someone whose reputation was made in those pre-internet days be prepared to research paper records, old folk magazines or whatever, and maybe to put that online, by scanning articles and finding a website that'll post them. You need links! Your own knowledge is no use, unless you publish a memoir or article online.

Or just accept that, however noteworthy, some people or subjects are not worth the effort of getting into wikipedia.

The wikipedia editors are terribly pernikety. Even uncontroversial statements such as where my company was based get tagged 'citation required'. Ignore them; don't let them get you angry!