What a great Idea Katrina!!
This is how I took mine:
1. Slow sutter speed, in this case 1/15
2. wide angle lens, I don't think this is really relevant, but I used a 10-20, I think any lense that let you have enought of the background will be fine.
3. you need and interesting backgroud, even if is going to get blurry it's always nice to guess what is behind.
4. Movement: you have to be in a moving surface or either move your camera, in my photo I was obviously in the car going very fast.
5. Focus: I set my focus in the mirror, this is actually a very easy photo to take, just try to be as steady as possible, so the focused part is really sharp.
Here is another example of a slow shutter speed photo
Photo
For this one, at the fair, I set my focus on my son and followed the movement of the teacup, once again, with a slow shutter speed