I will go with money. Everything is just easier if you have enough money and you can focus on other aspects of life.
Many think so, but scientific research confirms that money does not go hand in hand with happiness. A study of Illinois residents who won large sums in the lottery has shown that the rich have a bigger problem with enjoying common, small pleasant events. I can not believe it myself, but psychology is no joke dude. So maybe the secret of happiness is the art of being grateful for what we have now?