It is essential if you are going to increase your prosperity that you maintain a healthy awareness of your bank balance. You should be carrying out a finance health check on a regular basis. I think, personally, it should be weekly. Of course, you are free to do it as often as you want and if that means monthly or even longer, then that is entirely up to you but I wouldn’t recommend that you leave it too long.
My observation is that the tighter a grip you have on the pulse of your financial life: