Diane, I think we all can learn from your post - we dont' know what tomorrow brings, so a bit of "live now" is good to remember. I think we are all wise enough to know that we might live to be 120
so a little restraint is good, yet, we must enjoy today or live for today because, as you say, tomorrow may never come.
This was really brought home to me when my husband's best friend died. Many of you know this, but my husband has several MAJOR chronic illnesses and he has lived for 6 years with them. Someone with his illnesses has an average life span of 5 years - from diagnosis to death - so he has already outlived the averages. But he has a friend who was a bit older than him, who had ZERO chronic illnesses - was healthy as a horse - and died within a week of MRSA. Very devastating. Now, my husband's uncle, who is also very healthy and only a few years older than my husband, has spots on his spine, liver and kidney per MRI. We wouldn't be too concerned except that he had a malignant melanoma (skin cancer) removed 3 years ago and another 3 months ago. The spots could be metatasis (spreading) of the cancer - we will know next week. If he does indeed have cancer that has spread - it will again, be one of those head-shakers for my husband who is so ill but has outlived the odds as compared to his friend who did not even make the odds and possibly his uncle too.
So, when you talk about "live for today" "enjoy yourself" it really rings true to me.