Well, Ryan's right; eating garbage is healthier for you... but man is fast food delicious!
Wanna' know a secret? A dishonest and horrible secret that should never be used... but works every time?
If you do the drive through at any fast food joint; say you order an extensive list of stuff like: four double cheese burgers, two six piece chicken McNuggets, a number four, a number 7, two 99 cent fries and a Big Mac, go pay and pick it up, then park and after seeing you got everything (good luck at that part), go inside and say: "Um, sorry; but you forgot (whatever you ordered that you want more of; ie; double cheese burger and McNuggets) and they will just hand them over to you, no questions asked, every time!