Mid-life decisions..

Yup...I'm crazy. I have decided to go back to school for my Master's Degree. I thought it would be nice that maybe in 5 to 10 years from now I could have a "desk" job. Right now I'm on my feet, running around for sometimes greater than a 14hr day. I was on the night shift up until last year. After 28yrs I decided feeling tired almost all of the time was not good for me or for any relationship. I also had hit the milestone...50...the change, can I retire soon?, what am I going to do for the rest of my career?  I thought switching to a day time hours would fix me right up. Help me feel better with more energy to do things I want to do.  Normal sleep hours has definitely helped in my overall feeling of health. But I also have to think of the future...down the road....can I continue to be on my feet and run around like I do now? Do I want to? Also, lately people have been coming to me, telling me that I am now or was their mentor, 5,10,15 maybe 20 years ago. And now that I am more accessible to them working day hours now, they have been coming to me for advise and/or using me as a sounding board. It's nice to think that I have had an positive impact on people during their career, so that's also been the catalyst for me to go back to school. Maybe that's my next calling to be more of a mentor, like a educator in my career.  Time will tell. I laugh when I think that when I was 20 or so, I truly believed I would be retired at 50 living the beach life, traveling around the country. What a dream word that was....