(this also makes a neat bar trick with a cocktail napkin)
Start with a piece of cardstock 5 ¼” x 10 ½”.
Open the paper again, still patterned side down.
Grab the top left hand corner, pull it down and over until the upper edge is even with the score created in Step 2. Crease.
Open the paper, patterned side down to see the score lines.
Mark the center of the left hand edge and draw a line from that point to the score marks a quareter of the way to the right, top and bottom.
Cut along the pencil lines to create a point at the top of the card.
If everything was creased in the correct direction, it should fold up perfectly. Add a little bit of adhesive under the front point on the bottom to get it to stay upright.
and a side view: