The joke is, we all have the same punchline.
Be prepared to cut your little extra lines that come after a big punchline and move on to the next joke or routine to give your set more punch and crispness. You can keep them in your set, but if the audience applauds your big line, don't do your tag when it dies down, just move on.
I think my speeches are hilarious. I think I'm a natural comedian, but I like denying people the chance to laugh. I want to deny you the relief of the punchline.
On Update, the only real original thing was trying to take away the cleverness of the punchline and make it as blunt as possible.
I love fishing. It's transcendental meditation with a punchline.
Nickelback walks into a bar. . . there's no punchline because ruining music isn't funny.
Most practical jokes, I'll feel too bad for the other person so I'll stop just before the punchline.
I still think that, hopefully, you're not ahead of the jokes, and I think that has value. There is a punchline and it's pointed - and, again, whether you think it's funny or not, that's subjective.