First of all, you need to check what your money is spent on. For 2-3 months write down all your expenses and then divide them into two categories: necessary (e.g. bills, food, loan repayment, etc.) and unnecessary (e.g. clothes, toys, cosmetics, etc.).
Please read the originial post here: https://kodekspracy.blogspot.com/2018/06/sposoby-oszczedzania-pieniedzy.html