I did this exact same thing before I had my surgery.
Even ate an entire pint of Ben and Jerry's Ice Cream in one sitting one week before.. *LOL* (I had never done that before).
For me, I need to continually remind myself that the food will still be around even after I am through with this liquid/mush diet.
One thing to remember is that food will always be there.
It's almost like when you know a good friend has to move away to another state, and you want to spend every last minute with them before they leave, because you know you will miss it terribly.
But, you forget, that you can email that friend, and call or write letters to still keep in touch.
For me, I was forced to leave the food, when I had surgery, but I know I can have it later. ( the surgery=my lost willpower)
Same with a diet. Once you get to a place where you can control your portions and your eating, you will be able to enjoy the food, but in smaller quantities.
It's like enjoying your friend who comes to visit for a couple of days or weekends a year...etc. You will appreciate the "forbidden' food more when it's not so accessible.
You can start by thinking what I think.
"Bye for now...piece of thick, creamy fudge"...I'll see you in a few months...etc.
I know it isn't easy, heck I'm struggling with it all too. I just have to keep remembering that the food will always be there when I am ready to have it.
I think going cold turkey always makes it harder as well.
Maybe set out a bit each night for what you will 'allow' yourself to have the next day. That way you can take a bit of control back.
When you wake up in the morning you can say...ooh...today I can have 'fudge, nachos, .... whatever) and that's it.
I'm not sure if that would help at all...I hope you can use maybe on of these tips, I know I'm going to keep working on the 'saying good-bye' part of it all.