The other thing I have difficulty with is re-doing a moment that's been done a thousand times before... revisiting the "ordinary man" speech, or the "I thought you were dead, you rat bastard..." from TOGOM
or Pilot rewrites... But then I'm easily bored
I either try to come up with an interesting new twist (and I'm impressed when other authors manage that, too) or find a way to sidestep the problem entirely. "Two hours later, they'd agreed they'd both made mistakes and resolved to move forward." <g>
PJ