(Think: the classic cartoon angel on one shoulder ... a person’s brain gets wired to perceive and think about things in a negative light based on past experience, Leanza explains.

No one wants to make lemonade from it, thank you very much. If you think this cartoon is sort of a bummer, here's another cartoon that is even sadder. Get notified of new cartoons on Facebook!

Can you actually go through life without labeling what happens to you as good or bad? Sure you can. You have to train yourself to do this. You have been conditioned to think of things as bad or good.

Before you put positive thinking into practice, look for any negative thoughts that may be running through your mind. These include: A bad filter. Do you overlook the good things about a situation ...