Copied from your other thread -
For the team shot, take a look on a few professional club sites and replicate. 2 or 3 rows, and take a look at how the players in the line should have a similar pose - i.e. if they are down on one knee, they all have the same knee down. Then look at the height of the back row in particular. Some like the tallest in the centre, with the smaller ones at the edge, others like to get the head line as even as they can. What does look bad it alternating tall and small. Look where the keeper and manager are. 18-55mm lens for that.
Action shots, I take it you'll be pitch side, so get down low, on a low seat is usually best, look for the best combination of light and background, and remember if you want celebration shots, players usually run towards their fans/parents after a goal.
For action, don't let the shutter drop below 1/500th, and ideally you want to be at about 1/1000th. If the light stays even, I like to use manual, and get my settings when play is out of reach, but if the sun is out one minute, behind a cloud the next, I'd consider shutter priority. Just be aware that if you are shooting shutter priority, and the kits are very light or dark, then that can cause the exposure to be out. You'll be using your lenses wide open, unfortunately your lenses are slow as they are, can't remember last time I shot action slower than f5.6. 55-200mm , or maybe try your 300mm. Have a play around during the warm up for a bit of practice
Keep to continuous focus (AI servo) and use a single centre point, and fill the frame as much as you can.
That's the basics covered - enjoy and good luck
Mike