So I had this little dress. I just bought it to be a swimsuit cover up, so I was ok with the fact that it was rather short. After wearing it to the pool a few times and receiving half a dozen compliments on it I started to wish that it was long enough (for my particular taste, comfort, religion :):)), that I could wear it as a 'regular dress'. I took it to the fabric store with me and carried it around (like a true geek), and held it up to every bolt in the place until I found what I liked for a 'coordinating' fabric.
I cut an 8 inch strip and sewed it right to the bottom of my dress. I liked the results but it still looked a little bit "just thrown on there", so I made a posy and attached it to the shoulder.