Same concept as the original split... just done twice instead of once creating 4 colas. Then, after that split veg's out some, do another round... this time taking 4 cuts total and splitting the plant into 8 colas. You can continue if you have the head room and create a 16,32, or even more headed monster. Your nute needs and root room needs will really escalate (especially in flower).
You get the idea. Beef them up as much as possible for your grow area.
For example.... I run a 400w HID light in my flower area, and I feel that I can support 2-3 flowering plants at a time. My goal is to adjust my veg time and size to keep the flower area as filled as possible. At this exact time, circumstances dictate that I keep a plant in my veg area a bit longer as I wait for room to open up in my flower area. It will have about 32 tops shooting up when I put it in flower and has a nice even top with 8 colas at the moment.