start with some routines, stories and cold reading
when i started i would sit and try to come up with ****y funny neg hits, i'd come up with some stuff that i thought was hell funny but i would never use it in the field because there was never really an appropriate time to use those lines
i think the best plan of attack is to start with routines, stories and cold reading, once you have about 30 minutes worth of good conversation you can then add some ****y funny neg hits into the conversation and it will work because you will be setting the frame, leading the interaction and your negs will be relevant to whatever you are talking about, once you have your first 30 mins worked out, you'll find that you are prepared and you won't experience any more approach anxiety, but you still have to do the work, test it in the field and improve it a bit at a time
as far was the number 10 honey bunnies, their perfect and you can't think of anything, just neg them on something arbitrary... "you shouldn't be wearing those shoes, they say all the wrong things about you", ha ha, i like that, i think i'll use it next time i'm out