Moving out in 3 months, and want to save as much as possible/not be broke

Hey y'all! So I'm moving out of my parents house for the first time in 3 months and I wanted to hear some advice from you guys for last minute super saving while I'm still rent free! Anything from how to save on food, clothes, gas, what you wish you would've done at first, your experiences, etc., I'd appreciate some tips!