Go pick up a jiffy tray from walmart.. they are like 5 bucks for the smaller ones.. they come with peat pellets and a dome.. wet one of the peat pellets and let it expand.. use that to put your next clone in.. It looks like the first clone you took was basically the top of the one plant.. is that right? If so.. you have already topped that plant.. and it should shoot 2 stems off from the node you cut it at.. Do the same thing with your other plant.. and use the top for another clone.. look up cloning on youtube.. there are a few vids of how to do it properly.. Topping will definately increase your yeild as well.. I would also recommend keeping your temps under control a little better.. looks like those have stretched up quite a bit.. keep your temp around 85 during the day and 75 at night.. and you should see the plant bush out more and look less like a charlie brown cristmas tree... lol... also.. keep those lights as close as you possibly can to those plants! I would even recommend hanging them in the middle of the 2 plants.. and rotate the pots every day or two... this will help keep them from stretching as well... Once you top the other plant.. you will probably want to flip to 12/12 within a day or two.. they are going to get about 3x that size during flowering.. be prepared for that! Good luck dude!