I’ve always wondered, and Lucas Zelnik has a shockingly simple and good answer:

I think the biggest thing is to stay in front of people’s faces. You just have to put out so much content. Jokes take so long to write. I will put out chunks of material but very selectively, and, frankly, I probably won’t put out any more material until I’m ready to release an hourlong special, which I think I want to give that a few more years.