Over the course of my masturbatory career, I've found it easy to edge by gentle squeezing. I can also do this discretely, so it can be done at work, where I masturbate the most.
I've found I get the best feelings by grasping my cock through my pants and forcing my hips forward some until I feel the tingle. Then I back off so as not to get off. There have been a few times where I squeezed a bit too long and shot off in my pants, but that doesn't happen often.
I believe there is a mass of pleasure nerve endings at the base of the cock. Stroking like this simulates thrusting balls deep into a vagina or ass. I actually have to lay off thrusting that deep into my wife when I want our sex sessions to last. If I go too deep, I get that feeling and find it hard to back off without cumming deep inside her.
There are times, also where I can cum either flaccid or only semi hard by squeezing my cock in a pulsating manner at the base of my cock. I set off those nerves and go into a full blown non-hard orgasm.
I've also used this technique to get myself hard in a quick manner if I'm looking for a quick jerk.
Now I need to figure out why I get so tired while edging for hours. I've literally dozed off while edging in front of my computer in the middle of the day. Not really good at work if I'm looking at porn to get off.