Claire,
I've done an informal caffeine detox, because I was drinking sometimes 6 or 7 cups a day, plus at least one cup of tea and I'm a chocolate addict as well.
I thought this would be a good idea, as I'm pretty sure that going cold turkey on coffee and tea last time (when I realised they were contributing to my nausea) added caffeine withdrawal to my already sad state of affairs.
I started by setting myself times when I was alowed a hot drink, and then reducing the number of times a day. I actually worked on cutting out the breakfast cup first because it was the hardest to do without. Then I moved on to only allowing tea, and then cancelled those out as well. I would say that it's now a month or so since I last had a coffee, except for a lapse on Wednesday when I had a coffee and a tea while we were travelling. I felt awful on Thursday - more so in a physical sense than in a guilty sense! I found that interesting....
I'm now having only one or two hot drinks a day, and they're hot chocolates or Milos (Milo is an Aussie thing, heavily fortified with iron and various vitamins, a little like Ovaltine). I am also having one choccy treat a day, and I'm trying to post-pone them as late in the day as possible, so that when it gets close to bed-time I can tell myself that I've done SO WELL, maybe I can just go without.
I know you were interested in more serious programs than this, but I thought I'd start the ball rolling for you, anyway. I'll let you know if it makes any difference (first real attempt at ttc will be "concluded" next week).
Also, I've read up a lot of Dr Haas' information on a website you may have already seen, but I'll give you the link anyway, just in case:
http://www.healthy.net/nutrit/specdiet/ ... trodet.asp
Good luck
Amanda