While in high school, I read the book, The Silva Mind Control Method, by Jose Silva. The book introduced me to the concept of visualization. Visualization helped me perform better on tests, and I used visualization alot until I graduated from college. Then I stopped, until I read Antyhony Robbins, book Unlimited Power.
I still read and listen to motivational speakers, but I generally do a half-hearted job of the using the techniques, now days, except when I was recovering from spinal cord injury. But even then, I concentrated on the walking part, and not on other issues.
When you set a goal, then visualize you acheiving the goal, it is like a premonition, and then your sub-conscious starts working to acheive it. When you see yourself acheiving your goal, it motivates and inspires you. Give it a try.