Keep moving! Working towards your ultimate goals and dreams is what is going to keep you motivated. Action works! If you find yourself in a place where your unable to concentrate, your mind is wandering, or your feeling self doubt; get up and move around.
Take a walk, go to a new location, changing your surroundings is a simple task but can make a world of difference in your thought process.
Believing in yourself and who God has created you to be is key for being successful, healthy and for being able to move forward in your life.