As for 'Omniscient Third Person' I think the real trick is to avoid the trap of trying to bait the reader by showing you as the author know everything that will happen anyway. "Little did they know that..." type sentences tend to work well if you are aiming for a younger audience, but is not a good approach for adults.
The ideal Third Person approach is basically showing only what the reader would see if they were there themselves. Act as a silent film camera rather than a commentator, and hopefully your readers will follow you into the story.
As an example:
The village is still burning when the warrior arrives, a mass of crackling flame and burning timber where once there were homes. Dreams rise to the sky in dark palls of smoke, as lives are turned to ash and ruin. Community, family, hope and laughter - all are gone, slain by the savagery of war.
This sets a scene, but does nothing more.
