You're 24, it's time to buckle up and have some self-discipline, not "tricking" yourself into thinking you are broke.

You need to start tracking your spending and looking at where this money is actually going. Then forming new habits to avoid this spending.

Example - you see that a lot of your money is going into buying lunches, so you make a habit to prep meals for the week every Sunday. Set a calendar reminder on your phone for every Saturday to go buy the groceries, keep a list of meals you want to make on your phone - whatever helps you stick to that habit.