Focus your summary on the reasons you should be hired. If you do not hear by the target date, contact the person. Simply ask for the status of your application rather than whether or not you got the job. The process of deciding may have taken longer than expected, or other situations may have caused delays. Interviewing Never Ends Even if you spend your entire career with one company, your job interviewing days are not over after you land that first job You will interview for promotions as well.
Some companies even interview candidates for admission to management development programs.
The same techniques apply in all of these cases. You will still need to prepare properly, conduct the interview professionally, close for some level of commitment, and follow up.