So, after chatting to one of my colleagues, I've joined up with WeightWatchers. This doesn't involve going to any meetings (the phrase "hell no" springs to mind), so I'm just paying for the use of their web-based tools (50 quid for 3 months, and hopefully I won't need it after that). It does actually look like a pretty good system, and I've heard that it does work, so fingers crossed. The scary aspect of this is that just sticking to "real food" (rather than junk food) isn't enough - I need to sort out portion control too. Basically, I'm allowed up to 30 "points" per day (the point score is derived from the amount of calories and saturated fat), so I need to keep track of everything I eat. That shouldn't be too hard, since I've got the experience of being anal about my accounts (tracking all my cash purchases, for example), but the points really do start racking up quite quickly. I'm still in the measuring stage at the moment, so I haven't fully worked it out for the last couple of days yet, but it should get easier when I eat the same stuff regularly.
Anyway, hopefully this will all pay off. They do have some nice tracking tools on the website, e.g. a line chart with markers for "10% lost", "target weight", etc., so at least I'll get some reward from it. But I apologise in advance if some of my LJ entries/emails get a bit more grumpy over the next few weeks.