This link was posted on the "crochet your own fleurettes" thread on SplitCoastStampers. http://littlebirdiesecrets.blogspot.com/2009/03/how-to-crochet-flower-video-tutorial.html These are simple flowers, but they have great impact. There is also a video tutorial to help you learn this flower.
Here's the link for the thread on SCS. It's a great resource for patterns, tips, & chatter about crochet flowers. http://www.splitcoaststampers.com/forums/showthread.php?t=412822
Here are a bunch that I did. You can vary the size of the flower with thread & hook size. It's also fun to change colors after the first round, or use varigated threads for a different look. The first row is #10 crochet thread & size #7 steel hook, second row is embroidery floss & # 5 steel hook, third row is #3 crochet thread & #2 steel hook, and the last row is 2 strands of #10 held together & #5 steel hook.