I use a budget/ spending tracker and even my cash spending is logged, which is really tedious but has reigned in my overspends. There's always a rounding error

I use a budget/ spending tracker and even my cash spending is logged, which is really tedious but has reigned in my overspends. There's always a rounding error with cash (lost a coin, left some in the car etc) but I really surprised myself with some actual savings made. Even 50 cents for a cup of coffee 4 times a day adds up. I completely gave up coffee.