• Creating the snowflake pattern using simple poly-modeling techniques along with Blender's Mirror modifier and Spin tool
• Arranging the snowflakes using the Scatter and Drop script along with some manual tweaking
• Setting up render layers for compositing
• Using Blender's nodes to composite the render layers with added FX
• Adding colorful stars to the composited layers
• Adding a background image to the snowflake pattern

If you've never used Blender's Composite Nodes before, this tutorial will be a good place to get your feet wet with the basics!

(A Resource File is available in the blog post.)