Accepting Self!
For those people out there, thinking that " I am not good enough ", just always remind yourself that " YOU ARE GOOD  ENOUGH!".  Some says that it is easier been said than done,but you just need to start one step at at time. Always look for one thing that in your opinion, great about you. It doesn't need to be extra,a simple way of looking in the mirror and said to yourself that " Oh,i have a nice smile ". you can always start with that. 
Accepting yourself is a way for you to be really happy.  Don't compare yourself to others. Everyone has their own Goliath in their life. Believe me! You just need to focus on the things you have,at the moment. And  dont expect others will gonna accept you,if you cant do it on yourself. So be kind to yourself.