If you really find it difficult to stick with an exercise routine or feel some psychic force yanking you to physical sloth-ville, then you might want to look at your training environment. It is difficult to keep going to a gym or training area that is poorly maintained and located, crowded, rude and unclean. It just makes for a difficult time to concentrate on your goals if you are distracted or subtly punished for training in a certain environment.
4 Ways to improve your training environment:
1. Change your location. A different gym or community center might be more conducive to training. Parking? Easy access? I found it far easier to train and instruct in some parts of town than others. Some over-long commutes were just tiring and unsatisfying.

2. Change the people around you. Do you get tired of the look-at-me crowd, the yellers and the machine hogs? I would rather get paid less to instruct or pay a little more to train at a place that is friendly. Carefully select your training partner or people you want to be around. Friendly folk are more fun to train with. Some trainers are a better match than others.
3. Change the surroundings. You can change your surroundings by placing an exercise mat by your bed or a gym bag by the door. Maybe the cardio room is getting a bit passé for you. Time to try circuit training, rowing or even the power yoga class. Better yet, get outside.
4. Change the time of your training. Morning people like to hit the ground running in the early morning. These morning people like to exercise early to that adrenalin high and a sense of accomplishment. Also, there are claims that early morning exercise increases the metabolism throughout the day. Yet, some people do not get started until noon. Noon training can be a great time to get over that mid-day slump and eat your lunch earlier or later in the day. Then there are the night owls who like being active in the evening. It is a more social time and beats staying home in front of the television set.
Find other tips on fitness, health and self-protection at:
www.2ndwindbodyscience.com
Or check out the Stomach Flattening book:
www.amazon.com/Stomach-Flattening-Doug-Setter/dp/0973182520