Get the right qualifications. If, for example, you want to teach English at a community college, get a master's degree in English. Try to work as a teaching assistant to gain experience. Even though the salary may be low, "experience" is invaluable when it comes to teaching at a community college.
Volunteer to teach at the community college. Find out if the college is offering courses in English as a second language, for instance, and offer to tutor students one-on-one. Another option is to offer to help students who need help developing their basic writing skills. Once you have some practical teaching experience, the community college will review your application more seriously.
Attend workshops and seminars offered by the community college. As well as getting to know some of the community college instructors, going to workshops gives you an inside track on the sort of teaching style the community college is looking for.
Take a copy of your CV to the human resources department and let them know you are interested in teaching classes. Personal contact goes a long way when it comes to getting a job. Ask them about upcoming job possibilities and take a class related to that area.
Apply for a part-time teaching position. There are more part-time than full-time positions available, so start at the bottom and work your way up. Agree to teach a small, off-campus class just so that you can add experience to your CV. Community colleges also tend to like people who are flexible and willing to go to more remote areas.
Join the American Association of Community Colleges. Attend local meetings and the annual convention. Offer to do a seminar or a display at the conference. Again, being active in this organization looks good on your CV. Network and get to know about community college jobs -- both paid and volunteer -- that are open.