How do you increase your milk supply?

Hey y’all! I’m curious what you mamas do to increase your supply? Once my milk came in, I was producing a whole lot! I made a terrible mistake tho and didn’t necessarily follow a schedule. I only pumped when I felt full. I was pumping about 10-12 oz total in each session. I was doing about 4 pumping sessions. I shortly realized after I was only pumping once in the morning and once at night because those were the only times I felt full. Now, my supply has gone down immensely and I’m worried especially when I go back to work. I’m now only nursing and pumping after each feed but want to start my stockpile. Any tips on building your supply?