My second Christmas project was Christmas Tree Napkins. These are petty easy to make they just take a while to cut out! You can download the free pattern from here Christmas Tree Napkins. She has a pdf of the pattern and instructions.
What you need for 4 16" napkins:
1/2 yard of two coordinating fabrics
Once you cut out all your napkins put them together wrong side out sew around the edges leaving a 3" hole to use to flip them right side out. Sew up the hole, iron the napkins and fold you can either iron the folds or tac them to make them stay together.
Here are the four sets I made this year.