I can't get over how expensive bike stands are.. so I usually make my own. This one came out exceptionally easy, so I thought I'd share it!

Step 1: Parts and Prep:

Plywood: 3/4", 6"x40" piece
Wood or drywall screws: 8 x 1.5 or 1.25"
2 x clamps (optional)

You can get away with different dimensions, but these are optimal for the handlebar width of a bike, and mounting to a 2x4. Just remember if you change how far the stand projects from your post or wall, to allow the handlebars to clear the wall.

Cut according to the image.

Step 2: Assembly, Finishing Touches

Screw the parts together as shown. Be sure to drill pilot holes for the screws, as screwing into the edge of 3/4 plywood without piloting will invariably cause splitting. (1/8 pilot drill bit for a drywall screw).

To protect the bike finish, I taped some cardboard to the divots where the bike frame is clamped. A few wraps of duct tape or something more elegant will do just as well.

Done!

For my own writeup, see:

http://diffusecreation.com/2015/01/very-simple-bike-stand/