One of the most important moods in life is to be happy. Who wants to live full of misery and gloom? Being happy is a wonderful feeling because it's a key to the insight of joy. What would life be without happiness? I think it's good to just be happy and enjoy life before it ends.
Everyone goes through something. Whether it's financial struggle, death, or relationship problems. Remember there is only one key factor of your life: YOU. You are the only option to make yourself light up. No matter what it is that's bothering you, always remember to put a smile on your face. Like Kirk Franklin's song Smile, there are going to be more obstacles to come but even when you're hurt you smile.
Whenever you take a picture, or when you are out with friends, smiling is the key to your day. God created you to live and you should always be grateful to do so. So let's stay postitive. Whenever you are feeling depressed, just look at the mirror and tell yourself that "Everything is going to be alright". This naturally doesn't happen everyday, but there is never a rule to start now!