20 rules for footy isn't that many at all. Sheesh they shouldn't be driving a car if a player can't remember just 20 rules.
5 offensive rules:
* Create space
* protect and support the ballcarrier - block and shepherd
* If not involved in stoppage spread from it to offer options.
* Play the corridor
* Go long to the hot spot if no free leading options with smalls front and square.
5 defensive rules
* Close down opposition's space.
* Man-on-man at stoppages
* Zone on their kick-in or whatever the tactical structure is.
* Apply pressure inside forward 50 to keep the ball in there.
* Be accountable to your man
10 team rules
* Team comes first. Everything you do must be to better the team's chances of scoring, defending and winning.
* Always talk to each other - "clear", "hot", "pick up so-and-so", etc
* Play in front
* Spoil and don't go for the mark from behind
* tackle don't bump.
* Pin both arms in tackle if outnumbered to cause a 50/50 stoppage; Pin one arm without the footy in tackle if we have the numbers to force a spill or a free kick to us
* No short kicks to a contest
* Kick in preference to handball
* Kick to advantage of your teammate
* Play on as much as possible to move the ball quickly. Play with intensity.