The word Outlook literally means your attitude and your point of view towards things. For example, my blog is my outlook of the world and human nature. Outlook can be of two types. The way you see the world and the way you see yourself.
Your Outlook of the world is your key to being happy. You would have noticed how a pessimist never be happy. On the other hand, an optimist gives himself no reason to be sad. Similarly, to a cynic, the world is void of humanity because he doesn't believe in the system. That is why they are called pessimist, optimist, or cynic.... right? This is why I always TRY to have a positive attitude towards the world and have faith in humanity.
Your Outlook of yourself is not just your key to be happy, but also your key to success. Henry Ford said, "Whether you think that you can, or that you can't, you are usually right". It is said the battle is already lost when you think you'll lose it. Your outlook of yourself is your confidence. So what you have to do, is have a positive attitude and believe in yourself. It is hard to apply these things in your life. But if you tell yourself something often enough, you'll start believing it. (Important note: No! Listening to Enrique's "Not in Love" won't really make you believe you are not in love. :D )
That is why some people develop the wrong attitude too. They start thinking they are greatest amongst all of the mankind and whatever they do is right. And this is why people hate people with attitude. Though it is also true that people DO use attitude in their favour by creating a "hard to get" image in the opposite sex. But that is another thing. Generally, no one likes the wrong "attitude".
So always take care of what you think of the world, your life, and your self. Be nice to yourself people. Honestly! Cut yourself some slack. You can't be perfect. Don't try to be as I tried to be. "Imperfect is the new perfect". Haven't you heard? Stay what you are because you're good that way. Though I might add, that a little self improvement won't really hurt as long as you try to improve the right way (i.e. not try to be cool). ;)