Ouch! We have to many freakin' sports history majors in this forum! J/K
To answer the OP, it all starts up front. Buffalo needs to build a team that can control both sides of the line of scrimmage. Sort of like the team that just spanked us last weekend. It starts there. Great QB who doesn't have time to throw (refer to Peyton Manning's performance this past Sunday) is not going to succeed. We need a killer O-Line, and a strong D.
Good coaching, and strength and conditioning too. We knew going into this season that it was gonna be a long one. Hopefully the parade of free agents has yielded some guys who can build depth for the team, and we have a decent draft next April. We get a couple decent FA pickups and maybe we move to back to the middle of the pack. I say at best, we are 2 years away from being a top quartile team, and we happen to have 2 very strong teams in our division.
This is a marathon, not a sprint.