Choose to be optimistic
I want to encourage others to be optimistic, because I don't know if there is a reward in being pessimistic. I would want to enjoy my life, rather than work towards making it less bearable (no pun intended). Don't say anything hurtful, don't do anything hurtful. If you're sad, don't keep listening to sad music. You can think anything, but when it comes to your actions it's best to reserve yourself and focus on what you want to bring into your life. What moments do you want your life to be populated with, and what feelings?