Even failure teaches us something about ourselves and our goals so take the negativity out of any setback by focusing on what you have learned from it.
When faced with setbacks, taking a walk to think things through and refocus your mind can be very helpful. Sometimes it is that simple.
Break your Goals down into Smaller Steps
When faced with something that seems daunting, impossible even, break it down into smaller steps so you can tackle them individually. Momentum is everything and sometimes all you needs to regain momentum to tackle a project, is to take the first small step.
Enjoy the Process
Have fun and enjoy the process. For example; train while listening to music, I know that keeps my spirits high. Laughter and life force are immeasurable in keeping your spirits up and in keeping the joy in your life as you work toward your goals. Surround yourself with positive people.