My mother told me she wants to plant a tree in the yard. She wants one that will shade the window but not one that gets too tall. She just turned 89. I hope I have that attitude at her age.
As others have said, we never know what tomorrow will bring. If it makes you happy to plan or start new projects, go ahead and do it. Does anyone ever get everything done before the end? And if they do, what then? Just sit around with your arms folded and wait? No way. Just keep going. It's when we give up that we're in trouble.