Websites on Graphics
Graphics and visuals are essential in scientific papers.
There are few websites dealing with the topic. I like the site from Bates University "How to write a paper in scientific journal style and format", and in particular the page entitled "Everything You Wanted to Know About Making Tables and Figures".
Naturally, the Grand Master of visualization is Edward Tufte. On the page Cancer survival rates: tables, graphics, an PP, I enjoyed the example given that demonstrates that a table is not the poor man's tool, and that it can overtake the usual corresponding graphic in terms of clarity and interest, when the two are blended together.