1) You forgive yourself and tell yourself you’ll do better the next time. Everyone makes mistakes. Elon Musk failed three times to launch and flushed all his money down the drain. He succeeded the 4th time. One more thing – Others need to treat you the same irrespective of your failures. They should support you, not make you feel guilty for your failures.
2) Write in a journal. Become more aware. You might need a better strategy, but you also need to be patient. Change doesn’t happen overnight. Trust that everything will work out. Don’t overthink things. Become action oriented.