OK, for those of us who are on the job, there is one common thing; each of us was once a rookie. Lets take a moment to throw out some advice for the youngsters who are or will be starting out.
More officers are killed by stress than any other factor. Have something completely away from the job that you do to help you burn off some stress. That doesn't mean hanging out with your coworkers talking shop; get away from the LEO environment all together. Don't let this job kill you.
Let's see what other advice we can pass along. Who knows even those of us who are well in to our careers might learn something. After all we are all "rookies" until the day we retire. Never stop learning.