Just like you automated paying off the debt, do the same thing with savings. The more money that piles up in a place you can see it and easily access it, the easier it is to start giving yourself little treats and begin the process of hedonic adaptation.
That said, I do think a small, one time, treat for yourself to celebrate is worth it. Like updating your 401k contributions, or opening a IRA, or a new Vanguard account -- and drinking an adult beverage.