Step 2: Remove the outlet that some jackass of 60 or 70 years ago put not only at the midpoint of the wall -- the very spot where it is least likely to be useful -- but also right in the freaking baseboard, thus wedding a general eyesore, the bracing challenges of impracticality, and the excitement of wondering if the carpet might someday catch fire.
Step 3: Drill holes through the wall studs to reroute the existing wiring to the desired location of your new outlet. Using a keyhole saw, it is easy to cut a hole for the new outlet box!
Step 4: Then, drill a bunch of additional holes and run some new wire to a location where you want to add a second outlet box. NOTE: You should probably only be doing this if you know a little bit about wiring.
Step 5: Slap in your outlet boxes and wire up the outlets in the usual fashion.
Step 6: Then return to the hell which is the area behind your new outlets, and spend what seems like the rest of your life rebuilding the wall so that it covers your work. NOTE: I suggest testing the new wiring scheme to make sure it works before sealing it back within the wall.
If your project has been successful, you should look like this: