If your family has a strong family history of breast cancer or ovarian cancer (that means two ore more first-degree relatives with breast/ovarian cancer), and you are over the age of 25, you should be receiving a clinical breast exam every six months to a year and a mammogram every year starting 10 years younger than the relative was diagnosed ( for example, if your mom was diagnosed at 45, you should receive a mammo at age 35.) Check this website out for a timeline of when you should be doing things:
Also, has your mom thought about genetic testing? Those tests will reveal whether or not she has the BRCA 1 or BRCA 2 mutations. If she does, you could get tested as well to see if the mutation was passed down to you. Your screening regimen can change from there.
Hopefully this helps. If you have any more questions or need clarification, please don't hesitate to ask!