Read Strunk and White's The Elements of Style.Formatting:
This is an endless topic, but here are some universal tips that would work for any non designer: lessons from swiss style graphic design by Smashing Magazine.
Check this curated list of great infographics, look and get inspired!
The aim of a poster is to convey information clearly in a printed format. The best way to get there is to use software that lets you organize information and print it nicely. So using a software made for detailed page layout, text flowing around images and handling of high-res pictures is best.
I tend to favor those over over lab exp.
Scott MacKenzie set up some useful pages:
LittleStat(alpha) is a great tool to calculate statistics online. It also helps to pick the right statistical tool for your analysis through a simple series of yes/no answers.