Letting go of things that burdened you emotionally and affect your daily productivity is something you should be able to allow yourself to do.
Let go of those you always want to please, please yourself not other people.
Let go of toxic people that hinders you from growing.
Let go of that heavy feeling towards someone who caused you so much pain, be able to forgive and give yourself peace of mind.
Let go of the idea that you need to solve someone else's problem, focus on yourself.
Let go of the Hatred you are feeling.
It is indeed a very cruel  world yet worth living.