LOL! Seriously though...There isn't much you can do to improve it. CAI/Exhaust may yield you a couple MPGs (doubtful) and that's if you can keep your foot out of it once you do it. Plus the amount of money you'll spend ($1000+) just to gain maybe 1MPG...well it's not really cost effective unless you just want that shit on your truck.
12000 Miles a Year average @17mpg=705gal of fuel
705gal of fuel @ $2.50/gal=$1762.50
12000 Miles a Year average @18mpg=667gal of fuel
667gal of fuel @ $2.50/gal=$1667.50
So it'd only take about 10 years for that to start paying off for you.
HTH