If you look at your life like a chain reaction with each event affecting the next, then you can see how important it is to harness the maximum potential of every moment.
If the outcome of today affects the outcome of tomorrow and so on, rippling through the timeline of your life, you can see that every action you take can compound on the last causing a massive compounded rippling effect, changing your entire life and the entire lives of others.
You couuld, if you desired, make a decision or multiple decisions, right now, that would affect the entire timeline of everything in your lifetime. If in fact we do happen to live beyond these physical bodies, and have a life that spans forever, you will then find that every single action you take can have an effect on the lives of everyone forever. So you can thereby, right now, make an important decision, that will change the history of everything ever. Make it good ;)