I stopped going into the kitchen when I come home in the evening. I go to my room instead, or now that it's nice I go outside and spend time in the yard with the family.
Giving up foods, changing attitude, eating different, tracking EVERYTHING eaten as everyone else said is spot on but for me it was about IDENTIFYING the trigger moments that made me want to eat and changing them. All of my other decisions to change fell in place once I changed that!
Btw, there are still days I sit in my room watching tv with a hot tea and pout because I can't eat... Crazy? sure! but food was/is my frenemy that gives instant gratification, sooths them stabs you in the back. Sooooo, pout I do but I'm 70 lbs down since oct!!