I've always felt that an audience's attention has to be compelled watching your show. In order to deserve their attention over any length of time beyond a 5 minute practice set, I felt I should make all aspects of me and my words trustworthy and authentic.
I made it a point to develop or (release) a fascinating stage character and be consistent with that character throughout my set. My character (me) has a story and I stick to that story.
A while back I caught onto the power of allowing the audience in and give them time to breathe while enjoying the laughs. A good stand up knows how to 'stir the positive energy a bit', this can be done with stillness, you don't have to laugh at everyone of your own jokes. ;)
I've found also that a constant barrage of words kills stand up. Punch lines! Allow the audience a maximum of laughter time and minimum of listening time. (that's my new motto)
Or at least get to the point and make that point funny, repeat...often. That's stand up ... not everything, but part of it at least. ;) Go get'em!