Learning from the successes of others can be a key strategy for personal development. Many people have already managed to improve themselves and reach their goals, so follow their examples. Read about inspiring figures from the past, or talk to people in real life who have managed to achieve great things.
Do not change your views about how you feel about things because they are not popular. These views make you the person you are. Changing yourself and preaching things you do not believe in will only turn you into a person that you are not, and will do nothing to improve your self confidence.
When your outlook on life is negative you will attract the negative to you. When trying to reach a new step in personal development, try thinking of one positive thing that may come out of a negative situation. Try not taking the blame for things that are out of your control and get back or learn a more positive way to face challenging situations.