The best managers combine education, experience, and the ability to enthuse and motivate other people to achieve goals. Degrees in business and continuing industry education are helpful. Management courses taken at your own expense are another step forward—in dedicating the time required to take them, you show uncommon initiative and self-motivation. Night courses in community colleges offer numerous options for this type of training.
Ultimately, to be promoted, you need to have a track record of accomplishment, the drive to work harder than the people that you’re managing, and, possibly most important, people must respect and like you enough in higher management to see you moving upwards.