Live without cable, and only use internet sources if you must have anything like cable.
Buy the grocery store's "dollar menu", or the cheaper items. This includes dollar bread, rices for cheap, canned foods, cheap fruits, jugs of water for under a dollar if you want, jugs of juice (store brand tend to be the cheapest), etc.
I have done both. I am still doing the first one, and I mostly did the second one while I was still physically at my current college during the pandemic shutdown here. I don't do most of the grocery shopping now.