Resources
Here is a Keynote presentation on how to create scientific posters (disregard the page with the deadlines):
And here are more resources:
Former ITF Craig Willse’s presentation on poster design
ITF Michael Porter’s PowerPoint on scientific posters, with details about how to organize your poster like a scientific paper.
Swarthmore College tips on creating and presenting posters
Video on how to create scientific posters with Keynote
Keynote and PowerPoint poster templates
Examples of professional scientific posters
Examples of scientific posters by MHC students and additional sites with poster tips
The BetterPosters blog has excellent tips on creating a well-designed poster, and people can even submit posters for a critique.