I once heard that insanity is doing the same thing over and over again and expecting different results. So that means if we are not trying to change our habits or learn from our sin/mistakes, then we will continue to go back. Identify one reason why you sinned last time and use that to apply to your life so it doesn't happen again! Jesus died on the cross for our mistakes, so now it's on us to gain wisdom from them so we can live more like him.
Proverbs 26:11 – Like a dog that returns to his vomit is a fool who repeats his folly.