Here's how:

• Pick an area
• Decide what size bed you want
• Buy standard 2x8 or 2x10 boards from your local lumber yard or home center -- the type of wood you use is up to you. If necessary, cut them to the desired length.
• Attach metal corners to the boards with screws.
• Secure the bed into position by driving the 20" spikes into the ground.
• Fill your raised bed with soil, compost, etc.

Could it be any easier? Guaranteed to last a lifetime!