If it’s just you in an apartment then buy a plastic bowl/tub large enought the bottom of your sink and get in the habit of stack your dishes and flatware in there. Once a day then fill with hot water & soap, soak an hour and then wash and risnse.
Warm or tepid rather than hot showers. It takes some getting used to but is better for your skin, hair and water bill if it’s on the electric.
Adjust your freezer to where you can keep ice but just barely. Anything that goes in there will become an ice cube and help chill the other things.
I think the refrigerator needs to be 65 degrees or cooler to keep bacteria from growing? I’d try and adjust towards that if you usually eat leftovers or store bought stuff within a few days.