Eating Guides
The Healthy Eating Plate (jpg) – Harvard School of Public Health offers an example of what a healthy plate should look like, with detailed explanations of what to eat in each food group
The Healthy Eating Pyramid (jpg) – Harvard School of Public Health offers an example of what a healthy lifestyle should look like
Cooking Oil Comparison Chart (pdf) – This great chart off the Eating Rules blog summarizes which oils are best to use at which temperatures in order to preserve both their taste and associated health benefits. Check out the blog itself for the science behind the chart.

Supplements
Information is Beautiful: Scientific Evidence for Popular Health Supplements (web site) – Visually pleasing summary graphic off the Information is Beautiful blog provides you with a snapshot of where the evidence stands for various nutritional supplements, and also offers links to the research studies supporting the figure.

Reference Bookshelf
OSU Linus Pauling Institute Micronutrient Information Center (web site) – This web site summarizes the latest research relating to the role and clinical relevance of various micronutrients and their associated deficiency disorders.
Good & Cheap: Eat Well on $4 a Day by Leanne Brown (pdf) – This free 89 page e-Book provides great recipes and tips for eating healthy on a food stamp budget [AKA SNAP, the Supplemental Nutrition Assistance Program]