We always win and lose at the same time.Happiness and sadness walks hand in hand.
Neither of the two emotions are permanent. They are constantly changing. Life is so bad at one time, and the next moment, its all good, and beautiful. The dualities of these kind make a life livable. No one can keep winning for their entire lives. Everyone has to face failure, and if you make fun of failure around you, Remember that you are next.
Try to take happiness and sadness, as gifts of god. Never get too happy or too sad. There is always something lying in store for you, that bumps in your life whenever it's the right time. Things will always change. 'Waiting' is the right word.
Don't keep regretting your past. It will ruin your present and future. Letting it go would be the best option. Don't curse your past. Remember, whatever has happened, its for the good. It's all planned by that supreme power. Chalk out creative plans to not repeat the mistakes done in the past.
Never leave your friends alone in sorrows and pains. Sharing happiness is not that important that as sharing pain. If you are not there, you are definitely not the "friend".
Life is full of surprises. You never know what is going to happen in the next moment of the life. Surprises are the essence of life.
Always leave good memories of self in someone's heart and mind. It makes all the difference. Nothing else will matter. Do good. Make people smile.
Take a chill pill. Sit back and think. And don't think bad of anyone. Don't make your mind so complex that you yourself can't untangle the things it back.