Try the envelope method
The envelope method is an easy way to take control of your budget in 2021. First, you need to figure out how much you spend on essentials like groceries and living expenses. Next, you’ll decide how much you want to spend on non-essentials like entertainment. Once you have your pre-defined amounts, you can either take money and quite literally place it in envelopes that are categorized for each expense, or you can set up a virtual version of the system in your bank account.