Be Yourself

When you feel bad, one way to look at it is to stay positive, but instead of being perpetually positive, you may choose to just be yourself.
It's similar to the quotes:

"Honesty is the best policy" And "Honesty is the currency of love". And "You can't be everything to everybody", and "No one will punish you for doing your best, or being yourself".

Because you should at least be honest about how you feel and who you are and not be what other people want you to be or to feel. And if you can't be who you were born to be in this world then what kind of world is this.
Also live your own life instead of living other peoples lives.
It's all about selectively focusing on good things, and not focusing on other peoples problems. Instead focus on your own life(which is all you have time for anyway), and mentally block out other people who force their problems onto you. We do this naturally which is why we are able to do extreme sports like cliff diving. We focus on logic instead of fear.
So for now my current philosophy that I am testing is, "Be yourself, and live your own life."