Whack it! Measure about an inch or two above the "V" and cut the tops off. Allow them to callous for about a week and replant. Give it lots of good sun light and it should begin new growth from the ends.

Easy for me...I would cut off the two branches to the main stem, and root them, and leave the main stem to send out new growth. So you should end up with three healthier looking plants. Plenty of light and not over watering are key to good growth.

Christopher

Like your name (Neil Young 'Cowgirl in the Sand' playing in my head).

These two gentlemen are loppers extraordinaire. Their advice is sound. Keep it underpotted and lop it again in about a year. These will generally grow all year (given no extremities of heat / humidity / cold) if given good conditions. Your trunk should fatten well within two years.

Thanks for the advice! I have a few more questions as I've never cut back a plant this much. First, what would be the best light? In less than a month I'll be moving to an east facing apartment with a balcony. It'll be able to be outside but I'm on the middle floor so I'll have shade from the top balcony. Or would it be better to put the plant in full sun all day? Second, what is the best soil/mix to put the cuttings in? I currently use a 50/50 cactus soil/perlite mix, would the cuttings be better in more perlite? And third, when do I water? Do I water the trunk the same or wait until I see new growth? And do I mist the cuttings until I see new growth? Again thanks for your help!