Know your limitations and consider the needs of your family. Don't hesitate to decline a request to do more if you feel you can't or shouldn't. Invest the time it takes to get yourself organized. There are helpful books on the subject but set up a system that fits your needs and works for you. Keeping La Leche League materials in one place is essential.
Publicity is another good investment.
The more mothers who attend meetings, the more mothers there are to help out. When I became a lone Leader, I was amazed at the willingness of Group members to help. Share your needs with your Group. Most Group jobs can be done by someone other than the Leader. Like Leaders, mothers have their own styles.