It's important to recognize that caring what others think is a barrier to happiness. You can't control what other people think, and you'll never be able to. Therefore, if you base your happiness on their opinions, you'll never be happy, let alone experience true joy. It's recognizing how unimportant you are in the grand scheme of things, even though your ego may try to convince you otherwise. Work for something bigger and more important than yourself, and stop caring about something as conceited as what others may or may not think. Do things out of a genuine desire to better yourself, the lives of others, or the world around you... This is where true motivation stems from. Don't do things because you are motivated by the opinions of others. You'll never be truly inspired or empowered that way. You weren't born to be accepted in other peoples eyes. We all know this. So why are we all living as if the opposite were true?
"Your greatest friend and enemy lies within you."