Invest your energy in the things you can control.
You have to create your self-belief by going to your core to find the probable reasons for the negativity in you, and then demolish them.
If you are able to focus unswervingly on your goals, then all that you desire will become yours.
Trust in your own beliefs or succumb to the influence of others'.
Success is simply never giving in to failure - either in mind or body.
Look for solutions, instead of being difficult; be more thoughtful, instead of allowing anger to burn you out. Look at things from a different perspective, embrace change, look out for opportunities and you will feel much more in control.