Volunteering is rewarding in itself. Even if you find this is not the career for you, it still provides you the satisfaction of helping others. You'll learn how to interact and work well with others. Organizing a fund-raising event and other volunteer positions will help you learn how to develop and implement plans. Once you have developed a fund-raising event, you'll have to go out there and sell it to the public.
Marketing is often an important part of volunteer work.
You may find yourself in charge of coordinating other volunteers, or on the executive of a club or organization. This is a chance to develop great leadership and managerial skills. Think about what types of things you like to do. Think about what particular organizations you would like to work for. Ask friends, relatives, teachers, career counsellors or a volunteer centre for ideas.