How can I become motivated in my job
There are two ways of looking at a job. One is that it's a means to an end so that in this way you gain satisfaction in your social life and what you do after work, knowing that during work you are using this as a stepping stone towards something else in your life.
Another way to look at it is that you love your work so that you barely even regard it as a job - it's life.
Attitude is what it's really about. You can do the most boring work in the world with a great attitude and feel good about it. You do this with goals and knowing where it's going to lead you. Approach every day knowing that you're going to learn something that day, perhaps meet somebody interesting or have a positive influence on someone.
Also, work with goals - that's important, and ALWAYS keep your self talk positive.