How do you save money.?

Me and my husband bought our first house back in September and surprisingly we've been okay at paying the bills. Now everytime we get money we blow our whole check on clothes,supplies and food. And will go a week where we're "poor". Eating Ramen and finding change for gas. We go so long without money that whenever we got money, we spend it on clothes,supplies and pointless stuff. Well, I start my job tomorrow and I told him when I get paid, I'm putting some back. Even if it's $20 every pay check. We've tried the whole "I'm going to put it in my account and never touch it". But we always get it back out. Any tips on how to save money? I'm tired of being broke but I have a bad habit of spending money. 😶😣