Improve your speed control on putts by selecting two different length putts, alternating shots to each one and keeping the shot within the safety zone
Flexibility as you get older is very important, it lets you wind up your body to hit the ball with more power, and swinging a pole can help you do this as well as fix your release point
Practice your entire swing in super slow motion, this will allow your mind to focus on the correct muscle movements needed instead of trying to make your brain work on the correct movement while you are swinging, just do it don't think it