I got into long-term edging almost by accident. What drove me to do it was the fact that I really got into typing hot porn stories on my computer. I'd write these stories a lot on my days off. It wasn't unusual for me to spend most of a Saturday shut up in my room, typing away.
Of course, when you're writing porn, you get aroused, and one hand always finds your cock and you start playing with it. This is where the edging comes in. I found out that I wanted to stay in the mindset of the story, so I'd want to stay aroused. If I made myself cum, the release would take me out of the arousal state. So I'd keep myself worked up, but made sure I wouldn't cum. And I think that helped me write better stories, because I could experiment with the details, as in who did what to whom, and see what activities got me hottest.
On those days, I'd start writing and edging myself around 9 or 10 in the morning, maybe break for lunch, start up again, and work on it for hours, until the evening. All the time my cock would release its clear, sticky pre-cum, which I'd sometimes rub around the head, and sometimes get on my fingers and lick it up. If I let myself finally cum, I'd shoot a big, messy load all over myself, and clean up.
Depending on how aroused I was, and where I was in the story, and how interested, I would keep writing and edging way past my usual dinner time. If I had already made myself cum, it would be because the story got me all horned up again. If I hadn't cum, I'd be all the more eager to get back to writing and edging, and to bring the story and my arousal to the end.
I would work on things well into the night, past midnight, 1, 2, or 3 in the morning. I'd really work long and hard, keeping myself super-aroused, to make sure I got the story just right, to bring it to a proper climax, so to speak. When I got the story just the way I wanted it, I'd finally allow myself that release, jacking off to what I had written. I would shoot my huge load all over myself, finally releasing myself from all that pent-up energy from my whole day and evening of edging myself.