What you'll need:
* Tissue paper (At least two different colors.)
And that's it. Let's start snipping!
Step 1: Let's cut.
(Actually, I lied. The first step is to fold your cardstock into a card shape. But I figured you people don't need step by step instructions for that. So... cut and fold your cardstock into the size and shape you want.) Then:
Select which tissue paper to use. I suggest two-three different colors. Then cut out a rough square (there's no need to be exact, you're in a hurry and sloppy squares won't affect the finished result) and make your snowflakes!
For those who need a refresher course on snowflakes: Fold your square in half diagonally, fold the resulting triangle in half, fold the next triangle in half, and then fold once more. (This will result in a eight pointed snowflake.) Cut as you like along both edges of your triangle. Chop off the tip for a star in the middle. Open and be enjoy! If you wish a more involved tutorial on snowflakes, check out this collection of tutorials: http://www.instructables.com/id/Paper-Snowflakes-1/
Step 2: Organize and GLUE
Once you're satisfied with your cards, it's time to glue them down. This is tissue, so I suggest applying glue to the cardstock, not the snowflake.