First and foremost, great work Joe for starting this (I missed part one) and hope not only new players read it, but also the more established players as well.
Great advice all round and all I will add is to think before you hit - and play percentages (both from the tee or if you are in trouble). In real golf I try to visualize the shot, in the air and where it will land, and try to do that on here as well. A great course to test you course management is Merion - and again will teach you the value of playing percentage golf. Another idea is put the game into practice mode and tee off from longer tees than you normally play from and this will force you to think about every shot.
The other thing is learn all the different types of shots and how each reacts from different lies/slopes/spin etc and take notes if. Also now in practice mode you can use mulligans to experiment with the different shots - well worth using to shortcut your learning experience.
Probably the most under utilized shot from newer player is the punch - use it not only to get out of a poor lie, but from the fairway.
The other aspect you should learn is the "carry" of each shot/club in different winds, so you can negotiate the bunkers etc. Again think about where the ball will land (visulize) and what will happen if you get it wrong (percentages) (sometimes playing for the centre of the green will be better than attacking a pin and then having no chance of making a par).