Welcome to 3fc! I recommend not buying any junk or fatty foods and bringing it into your house. If it not there then you wont eat it lol. Also, surround yourself with people who are doing the same thing. Having a buddy makes it easier because u can keep each other motivated and prevent each other from cheating!
Welcome Alkiepop, Glad to have you join us. My advice is to look for a Support group, Chat, or Challange to join; small groups make it easier to get connected. Most sub-forums have groups covering almost every need, find one that inspires or motivates you and just post to join. You might look at UK Chicks for a start