So sorry to hear. My mom is a survivor. All her best friends are survivors of breast cancer as well.
http://www.teamtowanda.org/our-story.html
http://www.teamtowanda.org/our-board.html
My mom is the President of Team Towanda Foundation. Her best friend, Judith, was the first of their friends to be diagnosed and is the founder of TTF. TTF's main goals are to raise money to provide services for uninsured or underinsured women for prevention and treatment, but there are SO many resources on that site to help with your mom's fight. Attitude is absolutely, no question, the most important thing she can do. The doctors and hospitals will take care of her treatment, all she can do is try to stay positive, laugh, and smile. First and foremost, cancer is a horrible ugly thing but if it doesn't take away what makes your mom special, it'll never win.
In the "Resources" tab of the website are a number of things that will hopefully help her keep a positive attitude.
Again, so sorry to hear but I wish you and your family all the best in fighting this disease. Your mom cannot be defeated so long as she has a fighting spirit, a smile, and a loving family by her side.