Forget Self-Esteem. Try Self-Compassion.
Stop lying to yourself that you’re so awesome. Instead, focus on forgiving yourself when you’re not. Why?
Research shows increasing self-compassion has all the benefits of self-esteem — but without the downsides.

Maybe you’re not buying it. Talking to yourself not doing it for you? Imagine someone who loves you saying the kind words instead. Research shows this delivers serious results.
Via Self-Compassion:

Practitioners first instruct patients to generate an image of a safe place to help counter any fears that may arise. They are then instructed to create an ideal image of a caring and compassionate figure… The training resulted in significant reductions in depression, self-attacking, feelings of inferiority, and shame.
Say you blow your diet and eat a whole bag of cookies. Now that voice in your head is beating you up. How would your loving grandma address the issue? Probably with less criticism and more like this…
Via Self-Compassion:

“Darling, I know you ate that bag of cookies because you’re feeling really sad right now and you thought it would cheer you up. But you feel even worse and are not feeling good in your body. I want you to be happy, so why don’t you take a long walk so you feel better?”
You need to dispute the negative thoughts and reframe them into something positive. Every time that critical voice starts yammering, instead imagine Grandma giving supportive advice.
You forgive others all the time. You need to start forgiving yourself more often.


https://www.bakadesuyo.com/2014/08/10-happier/


He said “Yes, you have to worry because that makes sense in order to function effectively. However, on the 17th time when you’re worrying about that same thing, maybe ask yourself one simple question: ‘Is it useful?’“
At some point, you have thought it through sufficiently and it’s time to move on. What I have learned how to do as a result of meditation is to draw the line between what I call “constructive anguish” and “unconstructive rumination” and that’s made me a lot happier.
You won’t lose your edge. You can still worry a bit. But when it gets out of hand ask yourself, “Is this useful?”