I may be late to the party, but here are some things that have worked for me:
1. I don't eat anything till evening. Mind you, it's best not to leave it TOO late or I become a psycho-bit_h from he_l, but I would be even worse if I had smaller meals during the day (see "Hunger Switch" posts for why I think this is).
2. I work from home some days, and go to the office on others. It's much easier for me to fast in the office than at home. I don't even have a problem declining the inevitable treats, birthday cakes etc. when I'm in the office, but for some reason knowing there's a jar of peanut butter in the cupboard at home and I can't stick a spoon in it is very hard to take.
3. I allow 50 cal per fast day on milk in coffee and tea and subtract it from my 500 per day, so I don't feel too deprived. For that matter, I do not advise restricting caffeine too drastically (if at all) when you start - the headaches can be bad enough with the fasting but with caffeine withdrawal on top of it they would be unbearable. If you want to give up caffeine in your desire to get healthy (a perfectly laudable goal, though not one I share), do it gradually.
4. Someone above said to avoid ready-meals, and I usually do, but if I get home late from work the last thing I want to do is plan and cook a meal. I can't wait much longer than it takes for a microwave to go "ping". I have discovered I'm not crazy about Waitrose ready meals, but have enjoyed (relatively speaking) the ones from M&S (for those in the UK looking for a recommendation). I stock up when they have 3 for 2 offers.
5. Exercise is fine when fasting - I usually do mine in the evening once I've had a meal but that's also when it works best for me from a timing perspective.
6. Breath spray and an extra toothbrush/paste in your desk drawer are your friends. So is a 2 liter bottle of water filled up each day and emptied (into you, not the house plants!).
PS. Please disregard prior aborted post