Striving for what is Better

Whenever a person is complaining about things they don't have, the normal reesponse to that is, "Stop complianing. You dont know how good you have it. You could have it so much worse than this, ect." I'm not saying that I disagree with that, because I dont like it when people complain, but if you think about how much better you could have it instead of how much worse, then you will strive for that and you will try harder to reach that goal and get what you want.