Remove the headboard from the frame, and place it on a hard work surface. The headboard is attached with screws or bolts.
Sketch a design to display on the headboard. Draw the design on paper, and use it as a template if the design is complicated. Tape the paper to the headboard.
Hold the tack and carefully hit the tack into the wood using a rubber mallet. A hammer will damage the head.
Continue to add the tacks, and remove the paper when all the tacks are in place.
Reattach the headboard to the bed frame.