There are two main tips that you should work on when you are learning the best way to improve your motor skills.
Firstly, with any new movement pattern of motor skill just get used to the actual sequence or movement pattern. The speed of movement does not matter. Just get used to moving in the correct way. The main reason for slowing your movement down is to give you more time to process the new information. For example, if you are working on hitting a draw, swing slowly at the ball initially to give yourself the time to consciously process the new information. Keep the club head on the inside of the target line as you approach the ball then swing across the target line to the outside whilst keeping the club face towards the target. If you actually timed how long it takes to say these instructions to yourself it is several seconds, so by slowing the movement down you are giving yourself more time to actually, consciously process the information. Once you are achieving the movement slowly then begin to gradually improve your speed. As you do this, your instruction will become shorter and more compact. With our example, your command now becomes 'do that', but you are aware of what 'do that' entails - swing the club head towards the ball from the inside then swing across the target line to the outside whilst keeping the club face towards the target. To monitor your progress with this, work out what swing level you are on. If 10 is swinging the club at your usual full speed, swing initially at a speed of only 3. Keep repeating the movement at this speed, until feel you are making the movement successfully.
Now increase the speed gradually to say a 5 and see if you can still hit the same shot by making the same movement pattern. If you find it difficult, drop back down in speed and work on moving correctly 5 times in a row, hitting a successful shot, then move back up to a speed of 5. Keep repeating this until you hit a successful shot at a speed level of 5, then work on hitting 2, then 3, then 5 in a row. If at any point you feel you need to move back down a speed level then do this but move back up once you have been successful 5 times in a row and gradually you will notice you are making more shots at the higher speed. Then gradually speed up a little more again.
If you prefer to keep your speed at a fuller pace then only focus on achieving one change at a time. If you need say six changes in total, rather than working on all six at once at full speed and having too many things to think about, only work on improving and getting good at the first of these things. Once you have achieved this then bolt the next improvement on to this. By focusing this way, you will actually learn the new motor skill quickly, say six new motor skills in six weeks, rather than trying to learn all six things at once and by week six still needing to learn six things because you are giving yourself too many new skills to focus on - this leads to little or no improvement.