Changing a negative into positive is a part of changing your perspective.A glass is half filled or half empty is a question we need to think whenever wee feel negative about anything. Often we feel negative because we tend to genaralize things and self pitty that why did it happen only with me. But if you try to look at those who are suffering much more from what you do, you will better.If you are surrounded with negative people in your life, get away from them. Be with someone or talk to those who give you positive vibes. Have a sense of Gratitude in life. This will help you be happy in whatever you have already and be thankful to God and your near and dear ones for being with you.If you are in a bad mood, go watch a comedy movie or watch cartoons at home.Stop using negative words or sentences, though they might not ome out deleberatley, but try to make a consious effort in using 'I' statements than you.For ex: instead of saying Why din't you do this work, say I wanted you to do this work. Lack of confidence also plays a major role in changing positive to negative, but since we need to work on the opposite side of it, try and identify what are the things taht make you happy and do them. Feel a sense of achievemnt and reacll all the good memories. This will definitely boost your confidence and will automatically invite the positivity in your life.