I think for many of us, its a natural progression to slow down. I dont have near the drive as I did in my younger days. I plainly remember talking hunting with the older guys back then, and I didn't understand why they seemed more calm about it all then I was. They told me then, that when I reached their age, Id understand. Well, the chickens are roosting.
Try making your hunting easier and more simplified . If you are doing tree stands, simplify and ground hunt. Dont feel so pressured to perform, and when you go, take in all the sights,smells, sounds....you'll find yourself just enjoying the atmosphere whether there are deer present or not. Im addicted to nature first, and some days I kill a deer. Let nature soothe your soul. You may not go as often as you once did, all serious and nothing on your mind but taking big bucks....but when you do go, you will be fulfilled with a dose of natures peace. Killing a deer, simply means a tag gone, and if its the last one, it means your days in the woods are done for the year and is the end of it for a year. Go....just enjoy again without the hustle and bustle.