If there's only one talk you can download from watchtower observer,
http://watchtower.observer.org/
I'd recommend the one on blood. Hearing the speaker trying to explain this insane policy is very entertaining! PLUS, there's snoring clearly heard in the background.
It would be amusing, if it wasn't so serious.
I'd also recommend "assisting inactives". It seems that any contact with "non-believers" can lead to a JW becoming inactive!
Thanks Kent.
thinker