If you don't have premade cards - be sure to make your cards first. Just fold your cardstock paper and trim down to the desired size of your card.
Then for a more decorative look, take a single sheet of white cardstock and trim it down a bit, to fit on the front of the card. Use a glue stick to adhere your white piece of paper to the card front.
Now it's time to make your tree! Start by grabbing all your washi tape and tearing off one by one, a piece of tape and laying them down on your card front, to look like a Christmas tree. Your pieces will get smaller as the tree goes up. Think of it as a triangle or a bowling pin formation.
Once your Christmas tree is done, grab your brown Sharpie marker and draw on a small rectangle "stump" on the bottom of the tree.
To finish off your card, use a glue dot to adhere the bow to the top of the tree.
Then add your personalized message inside and mail/gift away!