American Cancer Society:
LIVESTRONG - how to check yourself for breast cancer:
http://www.livestrong.com/article/32094-check-yourself-breast-cancer
Young Women's Breast Cancer Awareness Foundation:
Young Survival Coalition:
BREASTCANCER.ORG - How to check yourself for breast cancer (step by step with pictures, too):
http://www.breastcancer.org/symptoms/testing/ types/self_exam/bse_steps.jsp