This one hits at an important point---schedule tough games! Particularly, road games.
We'll repost the entire entry here because it's brief enough to allow as much, and because we can't figure out how to link to the specific entry (try here, look for July 1, 2005, and scan for "On The Road Again")-
In the past 15 years, the following national champions have had no challenging non-conference road games:
In 2003, LSU had a non-conference road game @ (2-9) Arizona.
In 2002, OSU had no non-conference road games.
In 2000, Oklahoma had no non-conference road games.
In 1994, Nebraska had no non-conference road games.
In 1992, Alabama had a non-conference road game @ Tulane (why?)
The following national champs did have challenging non-conference neutral site or road games:
In 2004, USC had a neutral site game in Maryland against Va Tech.
In 2003, USC had a non-conference road game @ Auburn.
In 2001, Miami had non-conference road games @ Penn State and @ Florida State.
In 1999, Florida State had a non-coference road game @ Florida
In 1998, Tennessee had a non-conference road game @ Syracuse
In 1997, Nebraska had a non-conference road game @ Washington
In 1996, Florida had a non-conference road game @ FSU (they lost)
In 1995, Nebraska had a non-conference road game @ MSU
In 1993, Florida State had non-conference road games @ Notre Dame (they lost) and @ Florida.
In 1991, Washington had a non-conference road with @ Nebraska
In 1991, Miami had several non-conference road games, including @ Florida State
In 1990, Colorado had a neutral site non-conference game with Tennessee and non-conference road games with Illinois and Texas.
There is a point here.
It is "stop bitching that challenging September road games make winning the national title impossible." The top teams go on the road and win on the road and prove they are tough.