Each of us have different story in life some are unhappy because no meny ,some are unhappy in they lovelife ,some are in family problem ,some are in work problem and etc thats why i can say that we have different problem and each problem have solution . but for me life is like a lock you cant open it without a key..
Happiness is something which needs to be found out. Everybody has some or other problems but that does not mean you stay in those problems itself. Yes some may have more or less that is different but in order to win the life you would needs to have the self desire to be happy so that you can make others also happy and this could be biggest motivation.