Hello Pycook, and welcome to FitDay and your newfound commitment to yourself. I haven't tried Alli, but I wanted to respond to your comment regarding cravings.
I hope I don't get lambasted for saying this, but I believe that it is so important to realize and truly internalize that there is no such thing as a "bad" food. By emotionalizing what we eat, we do ourselves a bad turn. Let me explain a bit as to what I mean, and yes, this has everything to do with cravings... If I tell myself that cheeseburgers, ice cream and chips are "bad" foods (these are all 'trigger' foods for me, by the way), then I will continue to want and want and want and want them. However, if I tell myself, "hey, I can have whatever I want - IN MODERATION," then lo and behold, my cravings actually start to abate. This is not something that happens overnight, and please don't think I'm saying to eat whatever you want any old time - clearly, we're all here because our diet and lifestyle needs changing or we are focused on maintaining the good habits we worked at developing. My point only is that in terms of a permanent lifestyle change, it is just not reasonable to never ever eat high fat/carb foods again. The trick is moderation.
No, I don't keep my 'trigger' foods at home, but if I have ice cream once a month (I think you can guess what time of the month that is

), it's just not a big deal as long as long as I do so in moderation. The cool thing also about changing your diet is that the healthier you eat, the better you'll feel, and those high fat foods just won't hold as much as a draw as they do now.
Yes, hold yourself accountable for everything you eat. Yes, improve your diet. Just don't think you can't eat certain foods ever again because you are changing your lifestyle. The emphasis is on a lifestyle change, not on a diet you'll be on for a few months and then go back to the unhealthy habits you had before. If it helps to eliminate high-fat/carb food at first to avoid binges, by all means go that route - we all work differently, as another member had mentioned. But no food is 'bad' - there are simply some foods that are better enjoyed once in awhile in moderation.
I don't mean to get on a soapbox (I didn't even mean to write so much!); I'm no guru, just a woman who's had a weight problem her whole life and is finally learning how to take care of myself long-term, and not just for a few months on a 'diet.'