I know a lot of other forums have this so I figured I'd give it a shot. Post a technique here and I will give it a try. After trying it, I'll let you know what I think about it. This "review" is a good way to learn different techniques.
Try the stop and go method. Once you get that feeling like you are about to climax, just stop a while. Then go again. It's like having tens of mini-orgasms and when you do reach orgasm, it feels SO good. It's a very popular technique so I'm guessing you've tried it. Also, try rubbing your butt hole while you wank because that increases the pleasure too!
I tried the olive oil, although I prefer baby oil or KY for the texture, I liked the feeling. It got a little messy, but still I enjoyed it. I'll respond to your technique soon Andy.