What are the best ways to improve oneself?

To being with focus on being Assertive.

What does that mean. Follow the bullet points.

1. Stop judging people on the basis of how they look.
2. Do not consider others as superior than you nor inferior than you.
3. Whenever you get upset or angry, ask a question to yourself. Is the event making me angry or the way i interpret the event is making me angry. If the second choice is true then try changing your outlook towards events that disturb you.