This is from the Hussman Fitness site:
Q John - The site is great! Do you have any insight on how to prepare for "after" photos? I start week 11 tommorrow and was wondering if I should do anything different in the last couple of weeks?
A 1) Extend the aerobics sessions, still no more than 20 minutes of intensity intervals, but you can tack on as much as 25 minutes of moderate activity to the end to get lean in the last 2 weeks. DO NOT start doing aerobics sessions or other high-intensity workouts 2 or more times a day. You'll totally wipe out your glycogen and your muscles will look flat as pancakes.
2) Restrict carbohydrate intake modestly about 3 days prior to your photo shoot, sharply 2 days before your shoot, and most of the day before the shoot. That will deplete your glycogen and you'll drop water weight fast, so you'll look more "cut". (Each gram of glycogen binds to several grams of water. This is why Atkins dieters who restrict carbs seem to lose weight so fast - but it's nearly all water).
3) Now, that glycogen depletion is going to start flattening your muscles out too. So, the evening before the shoot, do one last aerobics workout and follow it with high carbohydrate intake. In an old issue of Muscle Media, Bill recommended a couple of bowls of fruit loops (I'm serious). The sugar intake will be grabbed voraciously and preferentially by the muscles. So your muscles will be pumped with glycogen, but you'll still look lean.
4) IF you don't have any cardiovascular, pregnancy, lactation, or other pharmaceutical issues, you may decide to use NWB (Natural Water Balance) starting 2-3 days before your photo shoot. NWB is a powerful herbal diuretic containing dandelion root and a number of other ingredients to prevent potassium depletion. (Diuretics that don't spare potassium can give you a heart attack). DO NOT use it for more than 4 days, and DO drink about 2-3 glasses of water each time you take it. That may seem counterintuitive, but if you restrict your water intake, your body will do EVERYTHING it can to retain water. The only time you want to keep water intake somewhat low (but still drink some) is the morning of your shoot.
5) Don't severely restrict sodium until the very day before your photo shoot. Same reason. Your body will fight back and you'll look puffy.
6) The morning of the shoot, do about 20-30 minutes of weight training to hit every part WITHOUT overly depleting your glycogen. That will leave the muscles with a good pump. Follow it with a carbohydrate snack like an oatmeal cookie with a little water.
7) Don't do a bunch of goofy shots where you look like you're trying way too hard to flex a particular muscle. Pleasant, confident, energetic shots in relatively normal poses are best."
www.hussmanfitness.org/html/TPQandA.html
I am powerful.
It was in the AM and I remember being really hungry later. 
