I used these instructions from Real Simple Magazine to make my own headboard back in 2004. I was really pleased with how it turned out and it looked really professional, and I only ended up spending like $60 for everything. It’s great because you can really add to a room with matching fabric of any kind you choose. I chose to use a faux leather looking fabric.. but, you can really do anything.
1 standard 3/4-quarter-inch-thick sheet of plywood cut 44 inches high and to the width of your bed (39 inches for a twin; 54 for a double; 60 for a queen; 76 for a king)
1 one-by-four cut into 2 pieces that are 12 inches longer than the distance from your floor to the top of the mattress
1 54-inch-wide piece of fabric cut at least 12 inches longer than the width of your bed
1 2-inch-thick piece of foam cut to the dimensions of your headboard (can be purchased from www.foamorder.com)
1 roll of cotton batting (90 by 108 inches; www.joann.com)
1 can of 3M Spray Mount
4 1 1/4-inch wood screws.