My brother, a while ago, showed me a commercial that had all these interesting sparkling particles in the background, and wanted me to figure out how to do that in Blender. And here is the result. This is a simple example but because you are using a particle system, the particles can be manipulated to go and move any way that you want. If you want to see a more in depth tutorial on how to manipulate particles a little bit more go ahead and ask. I just need a little encouragement.