You should try to get the best grades that you can. Some classes to focus on would simply be English, Math, Science, and a foreign language. Stay out of trouble and strive to have a good reputation. Maintain a good driving record. Begin to establish some credit history. It doesn't have to be much, but just enough to indicate some financial responsibility. Establish a good work history. If you have a job, be a good employee. Be competent, reliable, responsible, courteous, well groomed, etc. If you don't have a job, it could be a good idea to get one even if it is only one day per week. Be physically fit. Visit the websites of the police agencies that you are interested in.
