Football as the most skilfull game in the world, It is a hard question to answer as there are many different skills involved in football, but in all honesty the single most significant skill in football is the ability to be able to control the ball with foot - it is something that comes mostly naturally to the greatest footballers like Pele and Maradona and cannot be taught. Everything else is secondary to this one skill, because if you can't instantly bring a football under control when it is passed to you then it will be impossible to get the ball to do anything you want it to do (there are certain techniques that are used when controlling a ball which is to do with judging the speed of the ball and adopting the correct body shape to stop the ball in a way that it is brought under control - mostly though it is a natural gift that cannot be taught). The endless other skills required are being able to shoot accurately, pass, cross, dribble, tackle, curl the ball, head...and hundreds of tricks used to go past people (watch Ronaldinho)
Points scored - Points allowed = NET Points[Football]
3 points for a field goal in American Football
Poor technique can affect performance by if gymnastics, diving, etc; you will definetly lose points if done professionally. With a sport like baseball, football, soccer, basketball, etc; poor technique can affect the shot/throw/catch/pass etc.
... plotted accurately.
Simple, but not simple - answer a lot of questions accurately. Go to the "Unanswered Questions" section, and start with an area of personal expertise. Correct, helpful answers, even short ones, can earn you trust points.
A touchdown in highschool football is worth 6 points.
Two points, from what i heard