Minutes and hours are not something you can save for later. Time is like hundred dollar bills that will burst into flames if you don't spend them immediately. Your time can be used to invest in enriching experiences, but that time itself cannot be invested in such a way that it can be used when it's more convenient.

Valuable Time
At some time in our life most of us have probably been told that we were wasting valuable time. When we were young there was so much time on our hands that it scarcely seemed valuable. Then later as hair turns to silver the hours turn to gold. The time we have is limited--a non-renewable resource.
If we could put minutes and hours into an account to be withdrawn for later use, undoubtedly we would all do that. Sometimes the time we have in the present might seem better served to use tomorrow or on some future day. But we're out of luck in regard to that. If you're not feeling up to par, if you're not quite ready for your performance in the present, or if you're just not in the right frame of mind to do what you need to do now, then that's too bad. There are no do-overs for today. You might get second chances to do something, but today's time is gone forever once it has passed by.
In our society we might gauge the worth of time by our pay or our accomplishments, but time is far more valuable than any arbitrary measure we can come up with. You can't buy back the time that you've left behind you.
Yet even those idle moments sitting on a park bench in the sun or lying on the couch lost in thought are valuable. How can one compare the worth of such times to times spent accomplishing big things? I don't think we can. Each time is dependent on the other. A seemingly idle moment can be the prelude to the most major achievement in our lives. Or restful minutes of blissful peace can be the remuneration for a job well done.
All time is valuable, but that value cannot truly be measured by us or anyone for that matter. Whether by paycheck or inner peace, the worth of time is relative to how that time has fulfilled us. And even that is something we might not even truly realize.
How do you measure the value of your time? Do you feel that some of your time has been worth more than other times? If given a choice, would you take one hour of amazing experience or an entire day of just being home alone?