Top Mistakes
-->Trying to hit the golf ball up because most people try to hit the ball from underneath to give it that little bit more.
-->Trying to slow down your swing as you are about to hit the ball for fear of hitting the ball too far.
Simple Way to Fix These Problems
Shorten your backswing. It is that simple, not necessarily easy, but quite simple in theory. Shortening your backswing makes you hit more down in your stroke which nulls the effect of hitting the ball up, genius we know.
A shorter backswing solves the dread of striking the ball to strongly and sending the ball much farther than you wanted to. If your initial swing is not as far then you won't be attempting to slow it down in the middle of it either. Controlling the length of your backswing is essentially controlling the distance of your hit.
The solution is simple in writing but can be difficult to actually go through with which is understandable and in reality is expected. Changing your swing is like changing your fundamentals and everything that you were taught in the first place, it is not an easy task for anyone. It takes a lot of time, effort, and commitment in order to make this practice something that can help you out.