I've read an article and I think it gives a very helpful insight on not only becoming a better person but on how to be the best that you can be.
These are some tips on how to achieve this according to Anne Naylor:

1. You have to ask yourself, reflect, and identify what you want. You could have a talent that you have been longing to express, share, and develop. Or you would want to know how you would wan t to experience life like more happiness, better communications with loved ones, more fulfillment in ones chosen career or jobs.
By knowing this you will develop a strong conviction and concrete plans in which you can base your life on.

2. Let your vision grow everyday by nurturing them. Use your imagination to see, feel, hear, and how you are going to fulfill the life you want.

3. Take some action by practicing your passion. If you have talent, use and polish it. If you want to be more happy, create your happiness, do something that would make you feel good and happy inside out. You want to be better in communications then learn to practice and improve your communication skills by reading, watching tutorila videos, talking to people who are knowledgeable about this. If you are less fulfilled try to adjust your attitude.

4. Raise your energy level by boosting yourself. Fill your cup with love, love yourself, be thankful for the blessings you have in life. Count them so that you will know how blessed you are. Learn to be forgiving as well as forget past conflicts and hurts. Be lenient with yourself, laugh at the mistakes you made along the way. They are there so that you can learn valuable lessons. Be enthusiastic for your vision and goals in life believe that it happened already, feel that you already achieved it but stay open when it is going to take place and believe in your heart it will.

5. Be with positive people around you because they will generate positive atmosphere. Be with people who are supportive of you for they can enrich yourself by seeing how they actively create the best for themselves and you will learn a lot from them.

6. Discard those that are unnecessary, avoid the clutter. Learn to live with with which you need around. This will be very liberating for you.

7. Be organized and systematic by finding ways of dealing with the necessities in life so that you will not be distracted and be able to focus well. Agree only to what you want, will, and can do. Learn to say not if you don't want to do it and it does not fit you.

8. Do not set any time limits by learning to live in the present moment and respond to your intuitive guidance. You have to be able to know when to act and when to hold.

9. Have faith in yourself and in your capabilities by believing in your vision. Learn from children that as an adult you have to remain persistent like children in going after what you value.

10. The last but not the least, treasure yourself. Do things that show you care about yourself by eating having a balanced diet, eating healthy foods, have enough rest and sleep, have fund, stay focus on your vision and intention. By taking care of yourself mind, body, spirit, you are making an investment towards reaching for your goals in life.
You can watch the inspiring speech of J.K. Rowlilng

I can't give you "the" answer, but I can give you a few pointers I've learned from study as well as experience.

First, work on realizing what's worth getting upset about, and what's not. A lot of things that make people angry, sad, etc. aren't really that important or world-shattering. However, some are.

Second, find and keep some close friends. If you aren't around them, at least stay in touch and stay close in spirit. Everyone needs love and support, and friends (as well as a spouse or significant other) can help you out in all sorts of ways.

Third, be forgiving. Don't be a doormat, but always be ready to at least try to forgive someone. Stand up for yourself when you need to, though.

Misc.: be kind to others, especially strangers and those who obviously need some help. Donate to charities, or better yet volunteer. Always take time to evaluate what good things you've done today, what you should have done, and work to be better. It's a process, and nobody's perfect. But you become a better person by working at it, until virtue becomes habit.

Take some risks, but don't be silly, wasteful, or self-harming about it. Use your head. Be outgoing and confident, and others will respond well to that - you'll attract lots of positive people, and become more positive yourself.

I hope this helps, and good luck on the journey that we all need to take.

Asking the question is the best start! Just knowing what you want to be a better person and understanding what it takes. Trying your best and doing what you believe in your heart is the right thing to do.

i could say blah blah blah blah blah and blah, but i don't want to. i could go on and on lecturing u. i'm answering to help u, not to get easy points or try to get the best answer.

my unique answer is having great people to be your role model. i will let them tell you how to be a better person. i was fortunate to have people with excellent personalities to mimic.

First, you have to want to become a better person. Then you need to make a plan.

You don't become better just because you decide to. It takes observation (of yourself - not easy to do) and practice at making the changes you want.

A few truisms to keep in mind before you start:

You can be the best and still get better.
Rome wasn't built in a day.
Practice makes perfect (or almost).

There are many books worth reading that will give you great insight into becoming a better person. Some recommendations include:
How To Win Friends And Influence People, Dale Carnegie
The Power of Positive Thinking, Norman Vincent Peale
The Seven Habits of Highly Effective Teens, Franklin Covey
Tiffany's Table Manners For Teenagers, Walter Hoving
How To Be A Gentleman, John Bridges (Teaches women a lot about guys too - good for everyone.)

Perhaps there is something in particular about yourself that you want to make better. There is an abundance of information available in book stores (see links below) as well as the internet for just about every imaginable personal concern.

Finding a mentor is always a good source for improvement. They are particularly effective because you get real world feedback from an outside observer, not just your own impression of how you're doing.

If you are religious, your guiding book (Bible, Koran, other) will be full of wisdoms to assimilate.

Many schools have Peer Counseling programs which is another avenue by which you can seek ways to become a better person.

Often, the people considered to be the "best" are those who are the most selfless, who think of others and do charitable works. It's pretty much a given that you will become a better person by helping others in that "What you sow is what you reap."