Arrive early for your appointment as they call at the scheduled time.
Bring a copy of both parents' IDs for minor passports to avoid extra fees.
Having the application filled out and printed can save time.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.