Speaking of my personal experience - which was about "capturing" my self-worth and self-esteem for the first time (can't recapture what you never had), it began with two things, I suppose. One was to cut myself the same slack I cut everyone else, to realise that I'm no worse than any other human, that I deserve the same treatment as I'd say they deserve. And the second was to forgive myself. This one was huge and difficult but the more I referred back to "step 1", the easier it got.