Just to add to BIWI's message about not giving in to the sweet cravings in the first two weeks - LISTEN TO HER WARNINGS, because it is really important.
In the first two weeks, you are trying to get your body to change gear - out of its old ways of depending on a constant supply of carbs & sugar for energy, into using up your own blubber to get its energy source. This requires your body to stop pumping out insulin to store all those carbs & start using ketones, which is what the body uses for fuel, when there isn't sugar flowing through your veins.
This can be a bit of a shock to the system, specially if like most of us, you have been chowing through carby foods for most of your life. Everytime you think about food, your body reacts by pumping out a whole load of insulin, the sweeter the food you are thinking about, the more insulin is produced. So, stop thinking about cheats & treats & stop eating them.
This is your chance to find your inner sylph - so give it your best shot & don't cheat!!!!!!