Body Mass Index Calculator (BMI):
http://www.nhlbisupport.com/bmi/
BMI table:
http://www.nhlbi.nih.gov/guidelines/obesity/bmi_tbl.htm
Healthy Recipes (make sure the ones you choose are easy and inexpensive enough for your taste):
http://www.nhlbi.nih.gov/health/public/heart/obesity/lose_wt/recipes.htm
Helpful Guidelines for Controlling Your Weight (follow only those consistent with long-term success):
http://www.nhlbi.nih.gov/health/public/heart/obesity/lose_wt/control.htm
Calories Found in Foods and Burned by Exercise:
http://caloriecount.about.com/
Summary of Different Diets, A-Z: