There was a point of time when I was a pretty efficient vi user, not anymore though. However when I was, I found that in time, with practice, I got very good at

There was a point of time when I was a pretty efficient vi user, not anymore though. However when I was, I found that in time, with practice, I got very good at estimating how many characters, words and lines things were. So it’s just practice, after a while you can judge how far you need to go without having to count or think about it.