Several times I've come across this product called the bow-easy. If you find it hard to tie a bow and make it even, straight and laying neatly, then this product might be for you, too.
Here is a tutorial on how to use it. http://jerrikay.blogs.splitcoaststampers.com/2009/05/08/woo-hoo-i-did-it/
I recently found another tutorial on how to make your own templates out of chipboard - and if I can ever find it again I will post it, too.