There are a couple favorite books which I use when making ribbon flowers. I especially love Candace Kling's "The Artful Ribbon." Her pansy instructions are superior! Of course I can't reproduce the instructions here, but go to Candace's website to be inspired! She teaches mostly on the west coast, and I was fortunate to take a weekend of classes with her when I lived in San Diego. Candace's book is available through many sources.
Another favorite author is Helen Gibb, who has several books on the subject of ribbon flowers and what to do with them. I used to see her fairly frequently when Carol Duvall was still hosting a craft show on HGTV, and you can still access some directions by going to HGTV and doing a search. Helen uses ribbon flowers to decorate many things besides hats! And she offers the most luscious selection of ribbons on her website; wouldn't it be nice when we find a great supply source to be able to just blow a couple hundred dollars at the snap of a finger?! Sigh.