The premise is simple: I'll tell you what players you can confidently start the season with, and what players should cause your stomach to wobble if you have to start them.
St. Louis Rams
2006 stats at NFL.com and pro-football-reference.com
Marc Bulger (QB): Are you aware Bulger is one of the best fantasy quarterbacks in the league? In his career, he has averaged 270.55 yards and 1.58 touchdown passes per game. For comparison, Peyton Manning has averaged 261 yards and 1.91 touchdown passes per game. But since Bulger has less name recognition (or name hype) among most fantasy competitors, you can get him fairly cheaply. And if you do, you should be happy to start him. I've had the impression Bulger is an injury-prone QB, but since becoming starter there was only one season (2005) when he missed a significant number of games.
Torry Holt (WR): Holt is one of the most reliable fantasy performers you can draft: last season he had the lowest yardage output since his 1999 rookie season: 1,188 yards. He's missed two games in his career. Draft Holt and you know you are going to get a very good fantasy producer; you should be ecstatic to have him as a week one starter.
Steven Jackson (RB): Once again, look at yards from scrimmage: Jackson topped everybody in the league. He's clearly the #2 fantasy RB going into this season.
Jeff Wilkins (K): Always productive.
There are other Rams that can claim a reasonable roster spot. Isaac Bruce and Drew Bennett are solid backup receivers, and Randy McMichael could end up starting a few games for you at TE. But if I'm starting any of these three week one, I'm carrying a bucket around with me.