Here are ten reference sites that everybody needs to bookmark:
- The Taxonomy of Logical Fallacies
- A Handbook of rhetorical devices
- Data Visualization: Modern Approaches
- MBA in a Page (hat tip to Guy Kawasaki)
- Top 1,000 Web 2.0 sites (probably most useful for geeks like me)
- Refdesk.com
- Word spy – a dictionary of neologisms
- Purdue’s Online Writing Lab – grammar and writing guidelines
- Economist Style Guide online
- Wikipedia. I’m against using it as a primary source but it’s a great place to start your research
Any other suggestions? Essential reference sites?

I find OneLook very helpful for jargon or specialized vocabulary — things that aren’t in a standard dictionary, but are probably defined somewhere on the web, if only I knew where to look. One advantage over Google’s “define:” operator is that it categorizes the references, so I can choose, say, the medical meaning of a term, not the plumbing meaning.
Great links–thanks! I love to read what other people have to say about language.
Hi Matthew,
After a great meeting last night with the techie guys of Yuuguu in the Devere Park Hotel, I realised how much i wanted to be a part of their journey. Having taken a look at the Top 1,000 Web 2.0 sites link, they are clearly not on there. I hopefully will be joining Yuuguu to interact with their existing user base and drive marketing for new users. We are presenting at the Macworld 5 day event in San Francisco, and will be on Mac’s preferred list of must see exhibitors. Anyway, take a look at http://www.Yuuguu.com if you have not done already and it would be great to hear you thoughts.
Hi Matthew
This is not an online reference, but I love it – factually bang up to date, peppered with priceless quotes (eg Stella Gibbons: “The life of a journalist is poor, nasty, brutish and short. So is his style.”) and beautifully laid out. You can get it from http://www.guardianbooks.co.uk.