I've tried the odd fast day here and there over the past few months (check out my post "Trying a "fast" day on the 5:2 diet" here, often before or after a few days of intense gluttony, and I've definitely discovered some tricks that make it easier. Here are my top tips:
1. It gets easier as the days go on, so try and bear that in mind if on Day 1 you feel like you're DYING!
Anyone agree with my findings or having their own tips to share? Let me know!