How to add second receptacle to the same line?

Mental,
Why do you think it would be better?

I'm sure you've figured it out by now, but it's very simple to add another receptacle to each line. Figure out where you want the other receptacle, shut off the power to each line, and run new wires from the old to the new receptacle. Match wire size, and go from the "hot" side on one to the same location on the other one, neutral to neutral, and ground to ground. Since you've done it before, should be no problem, and you won't have burned the house down.