This is my attempt at explaining what for me has worked very well. The v is obviously one of the hardest concepts to get down for some of us. The following is my opinion and I will try to explain why I do it the way I do. Since this is my opinion, others will probably disagree. What I am writing certainly isn't written in stone, so take, change or leave out whatever you want. I am going to literally start at the beginning and work my way through it, explaining things as if I was talking to someone who had no concept of how to do it.
1) Lube your shaft throughly, and moisten your hands and shaft. Keep your shaft lubed throughout the routine and your hands moistened.
2) Do these standing up.
3) Pretend you are holding a softball and are about to pitch it. Your palm is facing upwards with the ball in it. Your fingers are curled up so that you can hold the ball. Your hand is down by your side. Now magically make the ball disappear without moving your hand! Your palm is still facing up, your fingers are out front away from your body, and still curled upwards.
4) Without moving anything else, rotate your wrist 180 degrees inward so that your fingers are now closest to your body. Your fingers are still curled upwards and your palm is also still facing upwards.
5) Slightly bend over your unit (I also bend my legs a little bit). By bending over you are giving yourself maximum access to the very base of your shaft, more so than if you would be sitting or standing straight up (this is one of those "In my opinion moments").
6) Now move you hand in front of your unit and cup your wrist (slightly bend your hand upwards in other words). Split your index and middle finger (your index finger is next to your thumb) and slide your shaft between them. Two things here: 1) bury your shaft as far as you can down into the webbing of your fingers; and 2) push those fingers as deep into your pubic bone as you can.
At this point I need to explain the cupping of your wrist part before some of you hurt yourself scratching your head saying, "What the hell is he talking about, and why should I do that!!??" At this point you are bent over your unit with your legs slightly bent also. By cupping your wrist as you grab your unit, and by being bent over you will be able to apply more pressure than if you just grabbed it standing straight up or lying down. In addition, like I mentioned earlier, bending over makes it easier to grab your unit at its very base better.
7) After you have done all of the above, begin to stand up straight, but don't begin jelqing yet. The reasons for this are: 1) gives you a second to get your grip fully implemented; and 2) makes the jelqing motion go more uniformly. Too often people when doing v's grab and start jelqing instantly before they have fully locked down onto their shaft, then they begin applying more pressure as they proceed up it. One of the keys to a good jelq is that you apply the same pressure all the way up, or over time you could find the base of your unit thinner than the area right above it.
8) Now jelq toward the base of your glans, pulling your shaft straight up toward your bellybutton. All of your pressure should be directed towards the sides of your shaft. The whole purpose of the v's is to increase the size of your corpus cavernosums which are located on the sides of your unit.
9) When you reach the base of your glans pull your unit out straight and hold it there while you grab your shaft with your other hand. Pulling your unit out straight helps a little bit in avoiding pulling your pubic hairs.
10) Repeat steps 5 thru 9.
The true test in my opinion of how effective a job you are doing is by how hard your glans gets as you approach it. Hard is good, soft is not so good. I do a set of v's, followed by a set of UJ's, then repeat this two more times. While I am doing a v with my left hand, I flex my right hand's fingers so they don't cramp up. I do alternate sets so that I can give them a chance to rest and recuperate for the next set. Do more sets if you want, but keep the number per set reasonable. Sure you could try and do 100 or more v's straight, but I absolutely guarantee you that your finger strength will have diminished from the first one to the last. The other problem with doing too many in a row is that you will start to get lazy or lose your concentration. By alternating it helps to keep your mind focused. If you alternate between v's and regular jelqs, you flex your fingers, and you keep the number per set reasonable, your first to your last v should be equally effective. If your glans is soft when you reach it, you have pretty much wasted that jelq. Numbers are not as important as quality. Now numbers and quality is really where it's at!!!