I decided I am going take up jogging. Over the last year I have lost a considerable amount of weight, just by a few diet changes. I don't want to gain my weight back over winter, and have decided to take up running. This morning I went out and walk/ran a mile. I used to run a mile in about 7:30. Today. it took me about 15 minutes. Does anyone have any hints or tips on getting started in this?