This is a tough business. Unless one has the sort of event photography that we have seen describe elsewhere on this forum, with multiple viewing stations, point of sale, printing or automatic fulfillment, schools sports and tournaments is a hard hard way to earn a living and if you do not love it, if you aren't into it for what it is, you are going to be very miserable!
It's easy.
There are three possibilities:
1. Professional. You follow Alain's advice, cutting down the per hour to what your name and experience can achieve in your market. Alain is not a casual person happening to do art and sell it on the side. His whole career is dedicated to what he is doing and his wife backs him up and together they have developed a remarkable success story based on training, experience, esthetics, feelings for his subjects (which his part of the name "Briot"), business sense, risk taking, idea of self worth, orgainization, hard work, implementation, building up an image, communication and more!
So forget that $300 per hour and alter accordingly. Double it for me LOL multiply by 5 for others and divide by 2 to three for most other photographers.
2. Semi Professional: This is not your day job!
You however do after-hours professional quality work and expect to be profitable. Here follow my advice earlier in the thread. double the contact hours to account for editing talking on the phone, scouting etc. do plaques and posters yourself if you can, otherwise use a service for fulfillment. Try to get in with the coach!
3. Parent: Here you have great equipment and skill but just your time and some pride in your chest!
Don't get self-deceived! You must make everything appear professional, otherwise you will always be the sucker that is doing a favor!
Make sure you cover expenses. People can think a photo is just a piece of printed paper and they have one at home.
Make a reasonable price. I think at least $24 is in order. Once you have a template, it's easy.
Always carry a poster, a team picture and a book of sample prints in a book. That way you go up a rung in the ladder. A smart business card. Not a smudgy Kinko's version, is a good investment. Website to buy more pics is a great idea.
Good luck!
Asher