Home Practice
From my end of the bargain the hardest thing to get students to do is to practice what was covered during their golf lesson.
I absolutely understand that people are time poor, and that finding practice time is difficult but what I will say is that any amount of practice is better than none at all.
A good example would be that instead of walking to the first tee straight from the car park, get to the course 10 minutes earlier, only 10, and spend 5 minutes having a putt and 5 minutes having a chip. If you did this every time you played your putting and chipping would certainly get better.
I feel that sometimes when golfers are trying to improve their full swing technique the perception is that thousands of repetitions are required to gain improvement. This can be correct when trying to completely conquer a gremlin in the swing but small bursts of quality practice will start you on the road and while you are travelling that road you will be improving your golf.
Consistency and regularity of practice is the key to improving.
Another example of simple effective practice is shadow practice at home with no ball. This is such an effective way to improve technique. Because there is no shot result involved you can entirely immerse yourself in what kind of movement are you making. Also at home you will be able to utilize reflections in windows or doors or even an actual mirror if you have the room. Being able to see yourself is actually the best kind of feedback you can get.
A couple of these home sessions a week is definately a way you can improve. Remember that short sessions with full focus often is the best way to practice.