From the Internet

There is so much information out there about digital photography, numerous websites and blogs that talk about photography and post processing. One of my favorites is SportsShooter.com, a search on their message board will answer just about any question you have about cameras, techniques, photoshop, etc. Another great resource is The Strobist, if you want to learn to use lights, just read David Hobby's blog. For photoshop there's http://www.photoshopuser.com/ also known as NAPP, National Association of Photoshop Professionals, you have to be a member to access the whole site, I am and have been for several years, but there's also info non-members can access, like PhotoshopTV. Of course there's Fred Miranda's site, http://www.fredmiranda.com and Rob Galbraith's site, http://www.robgalbraith.com, both are good resources for gear reviews.
Another great resource on the internet is being able to see other photographers work, looking at good photography can help you make better photos. See what the pro's are shooting, different angles, etc. Your photos shouldn't be the only sports photography you know, find a couple of photographers you admire and look at their work regularly. Getty images is a good resource, SI's website is another and Photoshelter has a plethora of great photographs to browse through. Most major newspapers have an online site that contains galleries from their photographers, a lot of those photographers are now writing blogs too.
If you know of a good photo website or blog, send me a link.