Father of 5 looking to lose 40 lbs

I'm so tired of always telling myself I'll address my eating habits tomorrow, it starts today, right now! Not after that 2nd bowl of ice cream, or the 8th slice of pepperoni pizza, but right now! I lost almost 30 pounds on myfitnesspal in 2014, so it works, but I didn't keep it off long enough for it to stay off, but not this time! This time I'm trimming the fat, I'm gonna work my *kitten* off...literally.