If you've assessed your own leadership style and strengths, gotten the training you need and become involved at the participant level, you are ready to take the next step: Taking on a leadership role.
Taking on a leadership role does not mean that you need to be on the executive board of an organization. Leadership can come in many forms, and especially when you are starting out you may want to start smaller. For instance, you may want to coordinate a program for a certain organization. Or, you may want to run for Hall Council Executive before running for USG or applying for an RA position. Finally, you may be working on campus with an opportunity to become a "leader" or "supervisor" within that office.
All of these opportunities have one thing in common: Becoming a leader on campus is beyond "getting involved." It is articulating a vision for a program, an office or an organization, then gathering the people and resources necessary and guiding the group to a successful completion of the goals that were set.
Remember, always to look back after the experience and yourself, and others, what went well and what you could do differently in the future to enhance the outcome next time.