Just think about smiling ☺. How do you feel when you smile? Did you smile? Actually, thought can lead to action.
Thoughts are powerful and they have great influence on your actions. Thoughts do not only influence your actions, they influence your moods. Therefore, it is very important to guide your thoughts. Because your thoughts come from the things you see, read, hear and feel, you have to be mindful of the things you permit to creep into your mind. You have to guard your mind with all diligence because your thoughts can become your reality.
For the fact that your thoughts can manifest in your reality, try never to dwell on any thought you would not like to experience in your life. Even when you get faced with life's challenges, let your thoughts be focused on the solution and not the problem.
Think positive, live positive!