It’s a nice sentiment, and it reminds us to make the most of our time. But it’s not something you should actually do.
If you live each day like it’s your last, there’s no room for growth. There’s no place for learning and improving, for practice, for small consistent actions that will make an impact in the long run. And those are the things that will truly get you where you want to be.
So don’t live each day like it’s your last. You have a tomorrow (and a next month and a next year) to build towards. But live each day like it matters – because it does.