I myself have only just played my first game (only get to play about one game a week and wanted to ask before the next one), but friends who have played more are leaning toward my opinion:
It seems like Cylons inflict much more damage on the humans after they're revealed than while they're hidden. So much so that it almost seems like the best strategy is to immediately reveal yourself (if you're not president or admiral).
While hidden:
-Throw a sabotage card in every once in a while.
-May or may not have a shot at convincing people to throw a human player in the brig.
After reveal:
-Super crises
-Powerful cylon player actions
-Can continue to throw in one sabotage card per skill test, which is about all you could do while you were hidden without giving yourself away.
So what's the verdict from more experienced players? To me it looks like a no-brainer for any non-president/admiral to immediately reveals themselves and benefit from the cyclon actions rather than staying hidden, helping the human players to keep off suspicion for maybe a shot at accusing other players that don't seem to statstically have a chance of helping the cylons more than declaring right away.