Learn as much as possible about sound logistics. Sound is a very complex and detailed science. You can spend hours studying the subject and still only break the surface. A basic, working knowledge of the science of sound is essential for working in the audio engineering industry. Learn about how sound works, and more importantly, how it travels. You can acquire this knowledge from any number of "Sound" books or through a basic audio production class at a community college or four-year university.
Investigate the music industry and the recording process. Several reference books are available that detail the industry and the overall recording process. However, you'll learn much more by diving into the recording process head first. Consider obtaining an internship with a local studio or enrolling in college for a degree in Audio Production. The recording phase of music production is very important, as no one will buy a record with a sound quality that is bad. Music labels invest millions of dollars in high-class sound studios and hire experienced staff to execute the recording process. The producer is critical to the success of the recording, but arguably not as important as the audio engineer.
Intern at a studio. Do a Yahoo! search and jot down three to four local studios. Next, visit their website. See if they offer internships. If they do not, try calling the studio and asking about an internship program. If they like you enough, they may even create one just for you. If not, your third or fourth year at a school will most likely enable you to expand your expertise to an internship. Talk to the adviser of the major for more information. If you visit a studio, you'll likely make contacts quickly. The studio owner and/or an independent producer or audio engineer may be willing to take you under their wing. The value of an internship is truly invaluable. Ask questions and seek as much hands-on experience as possible.
Start small by recording local bands and artists. The highest-selling artist in the world is not going to work with you if you've never produced an album before. Seek out local acts and high school bands and make your rates affordable to this demographic. Learn as they learn.
Practice your craft with a good friend or two. If you have a loyal friend (preferably a musician) and have a good relationship with the studio owner, you may get some studio time free of charge during after hours. Have your friend spend time in the booth performing vocals or other instruments while you fiddle with recording techniques and the mixer. If you can't get free time at a professional studio, check with a university or community college. Often these institutions provide sound studios free to students and sometimes to the general public for nonprofit uses.