What helps me, when i get to that point where I'm just like "........" Come up with something crazy! Try to find a joke, maybe she's wearing a mans watch? haha. I tend to ask about something she is wearing, cause those tend to have interesting convos *(sometimes).
PUA: Oh, thats a pretty nice watch you got there! Parsuco make watches? high roller

Target: No! hahaha, I got this for my birthday from my mom awhile back.
PUA: (switch topic to birthday), It looks nice! Compliments your outfit, i like a girl that can dress. My birthday was a disaster! So it was me and my 4 buddies heading to a high class club right, and we had 6-7 shots and downed 2 2-4s......proceed to embarrassing funny moment!
Honestly, I'm new at all of this, but in my mind I would use something similar to what i posted if I run out of ideas. Usually when I run out of ideas, my mind tries to remember DHV routines and stories. Criticism welcome !