The ARS Members' Website - a great resource for self-improvement.
The ARS website has a wealth of practical advice for the amateur recorder player. If you are not familiar with the website, you will be surprised at the riches available. Here are a few. (Note, the blue links will get you to the right pages, but to enter you need to be an ARS member.)
1. Get a recorder teacher. Pretty obvious, but the website has an extensive list of Recorder Teachers and there should be one near you. It is tempting (and cheaper) to "go it alone", but a good teacher can make sure you get into good habits.