La famille ou amis proches
Here is a quick and easy step-by-step guide for a breast self-exam: http://www.nationalbreastcancer.org/About-Breast-Cancer/Breast-Self-Exam.aspx
Also, you can sign up for an Early Detection Plan at https://www.nationalbreastcancer.org/edp/default.aspx. This will send you reminders about when to do your BSEs, CBEs, and when you should have a mammogram.
Hope this helps!