Reading sites such as this and getting angry is a start but it isn't enough. This site is simply a guideline to saving lives. Read this site and share it. Check out the links on here, read them and share them also. Education is key.
Education leads to knowledge and knowledge is power and it saves lives.
Contact a shelter. They are in dire need of help. Volunteer your time, as much or as little as you can manage. Donate to food drives and clothing drives. Donate money if you can spare it to enhance programs at shelters designed to help battered women get back on their feet.