im sure youll get a mixed bag of replies, its all a matter of opinion. i like to get rid of most of the bigger fan and some sugar leaves while its wet, because youll never get 100% of every small leaf, whatever is left will shrivel as it dries. I do a once over on all nugs as i strip them from the branches before i jar em up.
Special techniques? Not really. Patience and a close eye. Theres n shortcuts for work, i despise trimming machines, I never have a trimming session without all of the following:
a loaded bowl
favorite drink
a table full of aluminum foil/newspaper,
fiskars micro tip scissors or something similar(spring loaded),
something on in the background (podcast, movie, music)