it is to make sure your expenses aren't exceeding your income. The best way to do this is by budgeting. keeping your recurring monthly expenses as low as possible will also save you big bucks over time. This question is also means on how to manage all your expenses or savings like a bitcoin save and expend.
I was a bit lazy and I never use to do math while spending and that was the reason I use to have very less money left with me in the last ten days of the month. Then I realize to cut my extra spending and now what I do is that I make a list and enter everything which I purchase, even a candy and a chocolate.
After the month I take a look on my last month spending and cross the things which were not necessary, and by that every month I cut some things which we all purchase but have no use in our lives. Now I have no problem and I save some money every month.