We all know what it does, burns fast and very bright, its almost impossible to look away from, especially when you weren't expecting anything. Because of this it is usually added on to any effect to 'enhance' it, it also makes you look very flashy, if thats the image you're after. Best thing for you is to take a look at all the material you perform, think where you could add the flash paper and how it would benefit you, it makes excellent misdirection by the way.