It is possible to influence how you think, feel and live! It's a universal truth that you can't take care of others better than you can take care of yourself. So work on your own way of being, thinking and behaving first; before trying to help others.
Life is like a boomerang and you always get back exactly what you throw out. If you give love, you will get love back. If you smile, someone will smile back, etc. It’s the definition of karma.
Try to think positively as often as possible and life will be much more enjoyable! Believe in yourself and be proud of who you are, proud of yourself as a person and not your achievements/what you have or haven’t done. You will see yourself every day in the future so why not start loving yourself as if you were your best friend? Learn from yesterday, live today and have hope for the future.