One of things you’ll notice with some of the better runners in your club or town is how consistent they are from one week to the next. This is a very important part of any training plan.
Turning up for that track session each week, making sure you complete your long run and maintaining a consistent weekly mileage will help you improve.
If you are adding extra mileage make sure you do it gradually. Consistency can play a big part in ensuring you stay injury free and achieve your goals.