hard time getting motivated

I hear you on the motivation thing.Im almost 62 and still strong,and working a 6day week, albeit just 4 to 7 hours per day. But definitely not interested in working after the shifts are done.I got a ton of things to do. But just dont feel like doing any of them.Im not tired or sore from the days work. Its not a physical thing, at all.I just cant get it in gear.I keep hoping it will change.......Im in the middle of house renos.Going on 5 years now. The wife is not happy.....I got a couple more car projects on the back-burner. Im beginning to think Ill never get to them.....Just no motivation.
If you find a cure, please post it up.