Being goal oriented and knowing your win conditions are two of the biggest factors in being a good player

I play a lot of a certain fores prison variant and I've noticed this big time. If I coach my teammates during dark age on what they should be focused on and how we are going to win then I've noticed that they start playing at a much higher level, at least 150-200 elo difference. Often when I give them the advice on what to do they all end up having better scores and more kills than players on the enemy team who are 200 elo higher

This is an important skill to develop for your own play, but it can also help in team games. I remember when I first started playing I was an ultra noob who had no idea of build orders. I played with an 1800 on Arabia 4V4 and he told me to go knights, how much pop I should have before I click up, and how many villagers on each type of resource. I had no idea what I was doing but he gave me a goal and I oriented my play around it. It was an enormous help