One thing I have found, its rather interesting actually.. is that the plants actually seem to KNOW which brach is highest on the plant, when I do my LST, I start by bending the top as far down as I can get it without breaking the stem.. if the main stem is small enough.. it should bend quite easily without breaking.. after 24hrs.. I come back and all the side branches that were sticking out every which way.. will have all turned straight up towards the light (Its VERY cool to see this happen!) At this point you want to start paying attention to the growing tips on each branch.. the tip that is closest to the light will automatically become the "new" top of the plant.. and that branch will grow quicker than all the others.. the trick is to try and bend them so that they ALL stay as close to the same height as possible.. You basically want the actual top (or "Main Stem") to be at the same height as all the other "tops" on the plant.. this will allow for a more uniformed growth of the plant.. and will help spread the bud production evenly to all the branches.. The highest bud on the plant always gets the biggest.. so if you keep the branches at the same height (meaning distance from the light... not actual length of branch) the plant acts as if every branch on the plant is the "top" branch.. Its VERY interesting to see the difference in the way the plants grow when you use this technique!