This is how I make origami hearts. I haven't seen anyone else do it this way.
I learned this by accident last year while playing with some bus tickets (that happen to be connected squares, with perforations in a X through each...)
Thought I'd put this up, coincidentally near valentines day.
You will need one piece of paper that is twice as long as it is wide. (If you have a square, cut it in half.)
Step 1: Fold paper in half
Fold the paper in half, so that the open end is up.