Dang , don't know how much better I can do. I am already my 2 month into my own personal challenge and it is going great. I think people overlook this category too much and need to step back and asses the entire picture.
Pull your entire coffee shop, restaurant, pub , grocery store and snack spending into one spot ( I love Mint for this) Then start to drop that month over month.
In North America we eat waaaaaayyyy too much meat, start cutting those portions down huge to see quick savings. I eat zero pork for the most part and have stopped eating steak. Dial back the amount of chicken in meals also. Start using pasta and rice more with fresh veggies.
Just a few quick ways to kill it