Sometimes working out alone is boring and we need someone to be there for us to motivate us. We need someone who will help us to achieve our goal and pushes us to be strong. My DH motivates me to be strong especially in exercising, I really hate long run before but now I love it and it helps me to lose weight. A good music can also motivate us to keep going.

Signing up for a race helps keep me motivated to run.  I don't want to make a fool of myself when race day comes :D  

Zombies Run also helps.  

Social is a strong motivator for me. I train with a running club and would follow my running buddies to any race/distance/intensity just to spend time with them!

My motivation comes from within.  You only get one body and if you don't take care of it, you will regret it.

My friends motivated me directly.......They help me to achieved my goal..

I signed up for a DietBet, so basically I paid $30 to bet myself that I could lose 4% in 4 weeks. The community of people in the game is great. Everyone constantly posts what they have done for exercise and good food choices. I would recommend it for a boost of motivation. I am not going to do another one, however, because it has caused me to get a little obsessed/anxious about the number on the scale. And, since it isn't WLS people, they sometimes can be unrelateable. But it is nice for the support. I dunno, obviously this is a mixed review but I think its worth a try at least once. 

I find that my progress and the changes in my body motivate me.  The difference in my health and seeing how strong my body has been getting motivates me to keep pushing myself and to continue challenging myself.  You have to find in YOURSELF what motivates you.  After all, you did this for YOU/.  

Signing up for a race.

"Racing myself" (i.e. compariing a time from the previous month to the current month).

Good tunes

Talk radio/book on tape.

Being nosy (i.e. looking at peoples halloween decorations, landscaping, new cars etc)

"If I catch him, I can KEEP him" (when following that faster and hotter guy).

Counting unscooped dog poop piles

These are how I entertain myself out on a run!!!

Success is the best motivator. If you look much better and feel much better now because you began working out a year ago and did not skip many workouts, then you'll be so successful you won't allow yourself to go back to the way you were. Apparently that is not the case. So, what you need to ask yourself is why you haven't been a raging success.

For most people the problem is goals. If you do not have a list of realistic and achievable goals and a program designed to reach those goals incrementally that is probably your problem and, of course, you know what you need to do. Get to work on those goals. If you were my trainee, the first question I would ask you would be what is your first goal. And if you said something dumb like "lose fat", we would start from scratch and have a conversation about diet, not exercise. However, if you said, "more endurance or stamina" or "a more toned body", then I would ask for you second goal. Etc. Goals are crucial to success and success is crucial for motivation. Without goals you have no way of designing a program or measuring success so you're just wasting time and your failure is a foregone conclusion.