Well, actually, you cannot do yesterday what you need to do today. What I really mean is that never postpone anything for another day. Often, what you don’t do right now you will never do, the momentum passes and the opportunity fades away.
Let me give you a few examples:
You promise your child a certain amount of pocket money, but you don’t give him the money right away, because you don’t have this amount in your purse.
Now, suppose you do not have the time to go to your bank or to an ATM or for several days, or you forget about your promise. After a few days, your child does something naughty, and you want to punish him. You tell him that you won’t give him the money you promised, but only after he is punished.