Here are a few tips on how to play your best golf:
Understand and focus on the big keys and fundamentals in the golf swing, and then the smaller details will tend to take care of themselves. A lot of golf instruction does the opposite, it's focused on the details of the technical elements of the swing and not the big picture or the bigger fundamentals of the swing.
Since the golf swing happens in a time frame of a couple seconds, it makes sense that thinking about the important or big keys in the swing is more productive than focusing on too many little details simply because it's not possible to think about too many things at once while swinging.
Golfers who do tend to focus on the detailed components of their swing can still play well, but they won't be as consistent unless they are practicing all the time. When you know the fundamentals that are important to great golf, it's also easy to identify what the problem is if something is off in your swing.
Some of the fundamentals I like to focus on are the setup, swing sequence, staying connected in the swing, and the transition from backswing to downswing. It's also important to be aware of the path the club is swinging on in the backswing, downswing, and follow through. Things like the weight shift and how the body moves and turns in the swing are helpful to understand and do correctly as well.
I think it's important to have simple checkpoints so golfers know exactly how to get these fundamentals correct in their golf swing. For example, when talking about the swing path or plane, it's helpful to try and swing your club over your right shoulder in your backswing and then over your left shoulder in your follow through. This naturally helps to round out your swing path to the correct degree.
Making golf as easy as possible is my priority for my students. Simple concepts that work and are easy to understand will help any golfer get their swing working for them instead of against them in a relatively quick amount of time.