Complete an internship. While you're still in college or broadcasting skill, search out internships with local television studios, radio stations, and newspapers.
This sort of experience can be even more valuable than experience gained at a college studio since you will be able to see how a professional station operates. Find out if your college or broadcasting school has a department focused on student career services. That department might be able to help you find an appropriate internship. Internships are also a good chance to begin networking. Even if you are unable to do much actual announcing work, you will be able to meet professional contacts within the field of sports entertainment. Staying on good terms with these contacts can help you break into the industry after graduation.