for distance, work on your leg strength and fitness and spend a lot of time on your own or with a mate kicking the ball to eachother. practise makes perfect
I make sure that I have my hand on the top of the ball, and have the ball pointing on a 45* angle inward. Then I point the toe, and kick through the ball, transferring all my weight through the foot by 'hopping' on the back leg.
teaching someone to kick is pretty tough, and nearly impossible merely by typing online.. find someone who has a good boot, ask them to teach you their form, and then just kick ALL THE TIME.. i have a decent boot, and when people ask how i kick so well, i say "a decade of soccer," because that's how long it took.. biggest issue: not bringing your foot back far enough to get a good amount of power built up before you hit the ball..
