I think the key is to add variety. I had one girl who always put her mouth just on the head and rode her hands up and down my shaft. While it felt great, and I would cum fast, I still would prefer some variety. I actually don't like to cum too fast, because afterwards I lose most of my sexual desire.

Some different things you can try are; hands, no hands, licking, kissing, deep throat, testicle licking, and then switch back and forth to some hand jobs. There's all different forms of hand jobs that work great if you do some research.