What, if anything, do other E3s of any other branches do for money as side jobs?

I know I know But back in my day at 725 a month I lived pretty well You know after I paid my rental on a air conditioner and refrigerator from the post rental shop I could do almost anything I guess besides sensitivity training lower enlisted needs a economic class
Oh by the way I might be a old retired MSG who retired in 2013 Don’t even try getting a outside job I would drop the hammer hard

Train, study, and perform to become E4's, E5's, etc.

I delivered Pizza for Domino's Pizza when I was at Camp Lejeune, N.C.