My formula on saving money is (income - savings = expenses) you can put the 25% of your income to your bank account. That's the best tip for me to save money.
My professor told me that in order to save money, you have to save some before you budget your remaining money for your monthly bills, because if what you are going to do is the opposite, budgeting first your money for your bills before saving some, then you can't save enough money for your needs in life.
This is the wise advise because if you will arrange your budget of your monthly salary it will save a lot of money for you, saving is good for future and if you will save you will be able to invest as well I think it is good to list up all your daily needs then remove the unwanted things form the list so this way go for shopping and never buy any good that is not in your list so if you will be regular and disciplined using your month budget you will be able to save a lot of money.