self motivation...

i have none of it...
some people will tell you i do.
but I truely have none..
I do what has to be done, and what other people want done..
but when it comes to just doing something because I want to or just because..
there is absolutely no motivation...
I have said for years that i want to get back in shape
I have done nothing.
I was literally drug to the gym a few times, but i wont do anything...
I really do want to get back in shape, i hate not working out.
but unless I have a team to be in shape for, it just doesnt' seem possible.
I keep saying I want to put together all my lesson plans for preschool and have a curriculum ready if the day ever comes that im a teacher, but they have all been sitting there for at least 2 years and im just not motivated to do anything with them....
i only train my dog when i know there is a class that i want her to be the best in.
i really only do what is required or what other people want me to do...
so my question is....
How do I become more self motivated?