How to be a good person?

If you want to be a good person, then you have to learn how to forgive and forget other people's fault. You always need to be kind and honest to the others, smile to everyone, care, and concern to the others. If other people need your help, you need to stand up, support and help the others actively.
Futhermore, you can do volunteer work to help the inabilities.
For your family, you need to concern and support your family members, buy something they like, share each other's feeling and care about them all the time.
For your friend, you need to help and support them for every situation.
For your girlfriend/boyfriend, you need to concentrate in love, support, care about him/her.
You also need to work hard, no gambling, and support your parents, your spouses, and your children to make them have a better lives.

help others with a genuine heart without conscious expectation of return~
not to harm others in any circumstances
be nice and fair to all people~
not to do sth against your conscience

Before you doing something, you MUST be thinking of the effect(s)
BAD or GOOD? It's like "三思而後行" in Chinese.
HOPE it can help you to turn to a GOOD Person.