I take off every second node on the main... leave the first node, it's got the biggest legs, lop off the second, leave the third node, lop off the fourth and top at the fifth. Whether you do any training beyond this, you'll have a frame that's pretty well balanced, with a branch structure that's easy to maintain going forward. If you intend to flower early and raise small plants, a lot of branches to start might be beneficial. If you're growing a larger plant in a bigger space, you need to manage how many colas you have and figure out a support method early. For me, that means advanced pruning and defoliation to build some legs under the plant. Followed by some net support when the colas get heavy.