If I were to give recreational golfers advice on what would do the most good to get them hit the ball better, I would say these things:
Get a good grip that fits your swing. This is two things. A good grip is one that has a chance of success. Many rec golfers I see play with a grip that is too strong or doesn’t leave the hands working together. See a pro, get a lesson, to be sure about yours. Also, you might have a fine grip, but it doesn’t go with your swing. If you have a neutral grip and a slice swing, that’s trouble.
Learn the correct rhythm, and the tempo that is right for you. Rhythm is the same for everyone. This blog post shows you what rhythm is and how to get it. Tempo is different for everyone. Yours is probably too fast. Try this post to find your best tempo.
Your hands must lead the clubhead coming into the ball. Most of you do the opposite, because you’re trying to hit the ball with your right hand. This is an easy idea to understand, but difficult to execute because our “hit” instinct is so strong. See this video.
Pitching and Chipping
This one is really simple. First, get lessons on how to hit these shots. One lesson for each shot. They are their own kind of shot and need to be learned that way.
Practice your standard strokes A LOT so they don’t slowly drift on you and make you wonder why you aren’t getting the ball close anymore.
I commonly spend an hour on the practice green chipping and putting, mostly putting. I see other rec golfers come on, putt for about ten minutes, and leave. Who is going to become the better putter?
Use a pendulum stroke that moves in one unit from your shoulders to the clubhead. Do not let your wrists get involved.
Find an alignment spot on the green in front of your ball and hit the ball right across it.
Practice short putts, from two and three feet, A LOT. Hit these putts with authority. Do not finesse them into the hole.
Calibrate your stroke so you can hit to fifteen feet, twenty-five feet, thirty-five feet, and forty-five feet at will. Practice these stokes at a hole to maintain them, and to learn how to add or take off a few feet because of differing green speeds.
That takes care of ninety-five percent of golf. Learn the other things, bunkers, uneven lies, wind, a multitude of short game shots, after you have mastered the material above.