have just found this site...
http://www.tryflowers.org.uk/yourstyle.asp
its so great for our customers- going to pick one idea from it every fortnight and set up an area in the shop so they can buy all the "ingredients" to make their own design! They're all really simple ideas anyone could do but also a good early training for a new trainee to have a go at or ideas for demonstations (I do lots of demos for womens instutes who want ideas they can do themselves!!)