It's easier not to tell anyone except those who live with you for a while. When people start noticing your weight loss and asking about it (around 20-25 pounds depending on your start weight), then you will be comfortable with it. I tell most people that I've given up processed white flours and sugars -- that is actually the truth and it's acceptable. Mention "Atkins" or some other diet and they'll find ways to speak the devil into your head. You know this works -- don't let any nay-sayers win.

Join a challenge or a forum. Write a journal. Become part of the community that can help you when cravings start to get to you. And don't be afraid to take a walk or a bath when you get those cravings. Any activity that takes your mind off eating is good. Sorry, TV is connected to eating for me, so it does absolutely no good!