THREE THINGS THAT NEED TO GO RIGHT ...
Jump out to an early lead. The Ravens could use the crowd to their advantage. If they can gain a quick advantage, the crowd at Reliant Stadium will turn on a Texans team that got routed in the opener.
Establish a running game. Just as the Ravens did against Cincinnati, they have to continue their physical identity. Running the ball not only will limit Joe Flacco's chances of making a mistake, but it will also put him in shorter third-down situations.
Contain wide receiver Andre Johnson. The Texans truly have one established playmaker on offense. The Ravens have to push Johnson around the way they did the Bengals' Chad Ocho Cinco, who was a nonfactor in the opener.
... AND THREE THINGS THAT COULD GO WRONG
Texans pass rusher Mario Williams wins the battle with Jared Gaither. The Ravens need Gaither to win this rekindled Atlantic Coast Conference matchup. They can't afford to have Williams continually hit Flacco and make him uncomfortable in the pocket.
Flacco isn't as composed on the road. The Ravens' first-round pick was the picture of poise in the opener. But that was in the friendly confines of home. Playing on the road is a noisy, challenging proposition that will test the calmest of players.
The secondary starts to limp. The Ravens made bottling up the talented Bengals receivers look easy. Just remember that safety Ed Reed (neck), cornerback Chris McAlister (knee) and nickel backs Fabian Washington (neck) and Corey Ivy (ankle) are all battling injuries. One lapse by this group could result in a big play.