[1] NEVER EVER look down on others. They might be far better than you

[2] NEVER take for granted the caring of other people towards you. You might won't hear from them again.

[3] In life, even if you need help, and the person you always help ignore you, NEVER ever repeat what they did to you. Help them. Even it is not sincere, at least you did care.

[4] Take lessons from bad experiences. If you keep falling for that, you didn't learn at all.

[5] NEVER let others decide what you want to do next, in life or in whatever decision except God, your parents and yourself. They might not put themselves in your shoes.