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Ask yourself what traits your ideal self has that you don't possess now. These are the qualities you will work on developing to replace your negative traits. For instance, your ideal self might be more outgoing, punctual, and tidy than you are right now. Ask yourself why you admire certain people. Chances are good that they have some personality traits you could cultivate in yourself. Consider people you look up to in real life as well as public figures like athletes and celebrities. Try reading autobiographies or watching videos about inspirational people on Youtube. This can help you to identify traits that these people possess that you admire and would like to have yourself. Many traits that are often considered negative actually have some positives built into them. Look for ways to preserve the positive part of the trait while minimizing the negative part. For instance, many shy people are good listeners, and many aggressive people make natural leaders. If you try to change multiple personality traits at once, you won't be able to focus on any of them. Instead, select just one or two of the most important qualities you want to work on, and leave the others for later. Choose a goal that will make your later goals easier to achieve. For instance, if one of your objectives is to stop being lazy and develop a good work ethic, it would make sense to tackle that one first over getting promoted at your job.
Visualize your ideal self. Find people who inspire you. Ask yourself whether you can turn negatives into positives. Choose just one or two traits to focus on at first.