To detect breast cancer (in early phase):

Do a Mammogram every year above 35 years of age; otherwise do an ultrasound.
Timing: Best one week after mensis.
(SMMC on appointment - phone: +(1-721) 543-1111 Ext. 5)

Check your blood sugar regularly! A well controlled Diabetes reduces the risk of complications significantly.
Complications can be: amputation of legs, stroke, heart attack, kidney failure, erectile dysfunction, visual impairment.