Pushing life to the limit vs taking on day at a time

I'm sure there is other subreddits I could post this thought question in but I think this is a question that many others in the r/Entrepreneur subreddit think about.​The question is:Do you live life like there is no tomorrow with the goal of getting as much done as possible, pushing the limit and going further? Example, someone that works 12-16 hour days everyday with little rest in their schedule. In a sense, living like there is no tomorrow, although we can assume there is.ORTake one day at a time, get what you can get done but understand there are limits and there should be rest periods. Example, someone that works 8-10 hours or less, with rest periods, vacations. In the reverse of above, expecting a tomorrow to exist and planning more so accordingly. I think both see tomorrow as a reality, but the first one uses every minute as more precious.​It seems to me that both are double edged swords.Some of the most successful people I know are the person in the 1. category. But they never seem to be happy. Those in the 2. category tend to not be as successful. Though there are some that are vastly more successful than thoses in category 1 and seems to be significantly more happier than those in category 1. see hubwealthy.com/wealthy