Running is a great way to stay in shape and improve your conditioning and endurance. The goal is to gradually improve your time and distance. There are a lot of running routines to improve your overall fitness. The key is to develop a routine that is manageable enough for you to be consistent with.
A routine should consist of three to five workouts a week. You do not want to run the same distance with the same time at every session. Switch things up. One session should focus on speed over distance. This means running for just about a mile. While this may be a short distance, you want to go fast enough so that you are panting and out of breath by the time you finish. Keep track of your time and try to improve on it the next time around. Another session should focus more on distance. This means going for about two or more miles at a steady pace. If you ran two miles on one session, shoot for two miles and a quarter the next time. Rotating your focus between time and distance will develop your overall ability.
You should also switch things up occasionally. Try running on an incline if there is a hill available. You can also run on a treadmill if you have access to one. A treadmill makes it easier for you to track your progress and adjust your speed. If you mainly use a treadmill, you should also run outside every now and then. There is a completely different feel between running on a treadmill and running outside. If you can run a mile under a certain time on a treadmill, you may not necessarily be able to do so when running outside.
This is a good beginners running schedule for a novice runner. Getting accustomed to run in different conditions will improve your overall game and endurance level.