I never had a commitment device. Neither I was ever taught how to get one. In that sense, sacrificing my future in favor of my present has always been of my habits. As time goes by present becomes past and now I look back: my present self has already lost the battle against my past self (my past has won, to put it nicely!).
Now if I regret and if make myself commit to future, my present self will again lose, this time in a battle against my future self. This means that my present is the loser of all my lifespan, and life now sucks more than ever. If this is me at my worst, which is quite pleasant, then let’s drink a toast to all my selves!