Sometimes as we age we get bogged down in technique and lose sight of the intuition and even the learn for ourselves aspect. Get out there and be a kid again sometimes- especially in your short game practice. Learn what makes each shot tick for you- then you will be able to produce it more often out on the course.
Thinking about the next shot too soon. Getting ahead of ourselves. Building up tension are all detrimental to our game and our ability to think correctly and with purpose. Here are some tips I used during a round of golf to free my mind and to not use up wasted energy between shots.
The golf swing requires a lot of torque in the feet and legs to swing on a proper path and more sequenced motion. If you can wear spikes- at least while practicing- your game will be better for it. 
Having a go to fairway finding drive is a must have tool to become a better player. Here is a simple way I use to hit a low fade driver that all but guarantees my next shot is from the fairway.
Gravity Drop and Free Ride Down are both phrases used by successful golfers in describing the transition move in the golf swing. This video explains that phrase and is a carryover from a previous video where I talked about quick arms to get the arms in front of the body on the downswing.
A full release asks for the entire rear side to drive and move with the release. Using the ground correctly in the downswing can help lead you to this added benefit of power and control.