Another habit to adapt is to run every day. By doing this you eliminate the decision making of "Should I run today", the is no decision, you are going to run! Running everyday keeps you in a groove. Running everyday can actually help you to stay healthier, you stay looser, more flexible and begin to improve your running form. To accomplish this habit you also have to learn to make many of your days easy runs. Do not go out and hammer every run, learn to develop a smooth running form that will allow you to run everyday without getting injured. When I am in training I do take days off, but they are typically planned in advance, and usually once every 10-15 days. Otherwise I am out the door or on the treadmill!
Another key part of this habit is to make some of your runs short and sweet! A quick 10 minutes is better than not running at all. Many times I get out the door to run 10 minutes, and after 5 minutes I feel good and stretch it to 20-30 minutes or more. Try this for a month and you will find your running will improve.
So try running everyday for a week, then take a rest day. Then stretch it to 10 days, before taking a rest day, then 2 weeks and so on. Once you develop the habit you will find it becomes easy to get out the door everyday!