Do teams who know they are not making the playoffs play worse? (Like in the NBA).
They don't typically play worse. Every win in the NFL counts for more dollars for the owners in future revenues, so you don't usually see teams tank it.
Is there is any trading I should do to prepair? (Should I look to trade for players from teams who have potential to win their division/conference?) (NE, IND, TB, DAL, GB, PIT, JAC, NYG)
It is too early to think about that as a legit option until u see how the season plays out. Right now it looks like Romo or Plaxico might be your only worries if they will play in Week 16 of the NFL season (and therefore in the championship game).
"There is no charge for awesomeness or attractiveness." - Po (Kung Fu Panda)