Looping and snow particle systems too

Red Giant has a new After Effects video tutorial, Creating a Looping Particle System (episode 3), that uses both Trapcode Particular and Starglow to create a looping, stylized holiday snowstorm. Host Aharon Rabinowitz already did a looping particles tutorial at Creative Cow (with built-in CC Particle System II), but this apparently goes deeper.

In the same vein, Motionworks has a free project Particular: Snowflakes, and in Layers TV: Episode 67 guest Jason Scrivner demonstrates for beginners how to create falling snow flakes with Particle Playground.