I must admit I'm having difficulty thinking of one nice thing about myself each day. It's easy to think of nice things about other people, but easy to think of bad things about yourself.
Snoozen said that I am kind. So that is my nice thing about myself today. Not that I am kind always, but I have been kind and I certainly have the capacity to be kind. Not saintly kind, just regular kind, like if someone is having a bad time of things I'll make them a cuppa tea, or a meal, so they know I care and want to make something easier for them.