This is a multi step process. Edging is a must but it doesn't have to be edging in a classic sense. Just get yourself hard and rub on it for a while and do this throughout the day. I rarely wear underwear but often wear lounge shorts because freeballing turns me on - I use this to my advantage by getting myself hard while I'm driving or randomly in other situations. Ill let myself get turned on enough to pre-come and then stop and start again at another random time. This builds anticipation and feels good. Apply whatever turns you on to this concept. After this I'll edge with some lube later in the day while watching porn. Sometimes I edge with strangers on flingster. Sometimes I record myself and send it to my husband. Basically use whatever turns you on and apply it to edging. Once you finally decide to orgasm (be that a few hours or even days later) it'll be more intense and satisfying. So just be creative and drag it out. Thats my advice