If you want to be happy -- choose to be.
If you dwell on negativity your life is going to be just that.
If you smile on the world, it WILL smile back.
Enjoy the little things, they may be gone someday (Especially people and before you know it).
Do the things that you want to do, because you are in charge of your own life, and if you let other people determine your decisions you may live in regret someday.
Spend time with the people who lift you up, bring laughter to your lips, and who you cannot live without.
Don't over-complicate things. Things are already as complicated as they need to be.
When things get overwhelming and you feel like life is falling apart, remember your blessings - don't focus on the curses.
Remember no one has control over your life but YOU. Make the best of it.
Be content but always strive for more.
Don't be complacent or think you know it all, you always have something to learn.
When you are upset by someone - put yourself in their shoes, try to see their perspective - This will give you the much needed outside view.
Don't wish away any moment, you will never get it back.
Keep it simple, and always remember "Life will go on" regardless of the circumstance.
SMILE no matter what, it makes a difference.