Maya is my favorite. Make sure you build a sacrificial altar before sacrificing all those slave workers, since the altar doubles the culture points from 20 to 40. If you're going for a 2000-pt culture victory, sacrifice them all in your capital and build wonders the rest of the time.
I believe the Temple of the Moon gives two free sci advances, so it's good to shoot for.
I like the Blood Cult government but I've heard people say it's useless.
Beeline for Enslavement -- then you can build Javelin Throwers and start enslaving barbs right away.
Keep up your military -- the other civs WILL attack you.
If you've captured other people's cities, build a worker first. Often the worker will be of the captured civ's nationality, therefore a slave, therefore a candidate for sacrifice. I used this as the Inca in the Age of Discovery scenario but I suspect it works fine in Mesoamerica too.