Don't insult yourself.
Avoid saying things like "I'm so dumb", ""I am worthless","I am useless", etc. Even if its true right now, don't say it.In fact try things which challenges you.
Don't Underestimate Yourself.
Always try first, then conclude. Don't think how incapable you are of doing something until you have real measures of your abilities. "I can't do this" is an excuse "I have never done this before" is a reason.
Be Honest.
If something or someone is hurting you, just be honest whether it worth it or not.You already have lots of things to go through.
Value Your Thinking.
Build your principles of life, understand what's right and what's wrong. and stick with it. But also be ready to put them to the test and prove them wrong if necessary, cause that's what life means, keeps improving.
Forgive Yourself.
We ask or give forgiveness to others, but what about our self, we too do many mistakes, we do have guilts. Learn to forgive yourself and never again try to repeat those mistakes.
Don't Tolerate Disrespect.
Just as we said in the start, don't use insulting words for yourself, similarly, don't let anyone too. Reply them back with either your words or your actions .