What if you had the motivation?

What if you had the motivation?

Are you putting things off, waiting for motivation to strike?
Where does motivation come from and why does it wear off?

I was once told that motivation is a door that is locked from the inside. In other words, only you can unlock it. No-one else can motivate you. All that other people can do is help create an environment where you can motivate yourself. So how can you find the key?