It depends what you're going for. If aiming for strength, I would do them one at a time, for instance, 5x5 workout plan. Helps replenish glycogen stores and phosphocreatine in muscles between lifts to stay strong.
If aiming for more of a mass driven style, supersetting always seems to take the prize here. Like jumping straight into back from chest, tri's from bi's, shoulders from legs, etc etc.
You can find very detailed articles about both styles in the RSS feed, on T Nation, Muscular Development, etc etc.