Now determines the future. Now is the "seat" of tomorrow. Don't project what happened yesterday into tomorrow. You'll create more of the same in "what is to come".
If you want to start fresh, make Now the best you can and see that best going forward into tomorrow. That is the most productive way to correct past mistakes, one moment at a time. And if you slip up or get off track, don't worry or fear. Just realign yourself in a successful Now and the future will be much brighter and better.
Remember: life is a journey and we are all works in progress!