I know I struggled at first myself. My first go round with MF was in September and I lasted a couple of days then BLAM outta control. On October 1st I just determined that I WAS going to do it and the first 3-4 days were really tough but I stuck with it, drinking the water, eating at the right time, etc. Now it is almost like second nature and those feelings...for the most part...are gone.
I think the first week or so IS the hardest, the craving for food is so strong and even now a commercial comes on showing some sort of lovely looking food and I have to turn the channel BUT overcoming the ADDICTION to food is an ongoing thing I will have to deal with for the rest of my life. It truly is an addiction and I think that is the biggest struggle, at least for me.
Good luck and stick with it! I keep an online private journal and I give myself regular pep talks (and yes, sometimes a swift kick in the rear) there because I am determined to GET THIS DONE this time. I will be dealing with this for the rest of my life, the least I can do is deal with it while being much thinner!