Sounds cliche but i'm only 21 and have learned a lot in my short time. Being content is an absolutely HUGE one. If you keep saying i'll be happy when I find a significant other, get a promotion at work, earn more money, get a nicer house, nicer car, or when you lose the weight that's holding you down...you'll never be satisfied. It'll just keeping you wanting more and more and more without a feeling of long term satisfaction. Might be very happy with your new car or house for a week or two but it's just a money pit that will make you work harder and harder making it more difficult to save money not making you truly happy when the novelty wears off. Also you can't compare yourself to others. I try to not be superior to another person I just try and keep improving and being better than my previous self. Stop and smell the roses and enjoy the current...don't hold your mistakes against yourself. Forgive yourself for them and do your best to correct them. I have MDD and OCD and the bad days are bad but it just makes the days of watching a movie, watching a game, spending time with family that much better. Being a good person to others and yourself is a BIG BIG one as well. I firmly believe there's something after this life but I don't believe in any form of organized religion. We've been making up gods and stories since the dawn of man. There's 4,200 current religious groups. Maybe there's a creator...maybe there's not. I do know for darn sure that i'm going to be a good person because I WANT TO BE and it feels right and good. If you're good to others you're doing the right thing and it makes you feel good. If there's a better place I think it has to do with how you were as a person and not so much your faith because how the heck am I supposed to know what to believe in. Could get eaten alive for that statement but it's what feels right to me 100 percent. Love your close ones as much as you can because they could be healthy and active one day and gone in a matter of hours....really. Learned that the hard way and once they're gone they're gone. Enjoy every day likes it's your last and if you want that piece of cake have that piece of cake...within moderation of course i'm not telling you to eat cake all day. We really could be gone any day and every day on this earth whether be good or bad is an absolute gift because while I absolutely believe there's intelligent life somewhere in the universe the majority is absolutely not and it is extremely rare for everything to happen properly to support life. Being content with what you have is HUGE.