Further reading on the subjects of design in general, and posters in particular.

• Better Posters — If you’ve googled ‘How to make a conference poster’, you’ve found this site. Aside from helpful step-by-step poster critiques, there is a steady stream of design-related reblogging.
   

• A List Apart — it’s about web design, but so many lessons from web design can be brought over to print design with few or no changes. Pay particular attention to the Graphic Design and Layout & Grids article categories.
   

• Tufte’s The Visual Display of Quantitative Information — How to present information.
   

• Data is Ugly subreddit — How not to present information.