A few things you can do.  Before ordering, avoid options that add weight (AWD, moonroof, bigger wheels).  If you live in a hot climite, order a light color. 
  
Inflate the tires 5 psi over recommended provided you don't go over the max pressure on the sidewall. 
  
Do a complete changeover to synthetic lubricants including engine, power steering, transaxle and rear differential on the AWD models.   
  
Take a look at doing a CAI and a chip.  The chip manufacturers can do either performance or economy tunes for anywhere from 87 to 93 octane.