Eating only protien (versus carbohydrates) should smooth out the hunger. Keeping busy helps me ignore the hunger. For the first two weeks, the hunger was mostly mental. Drinking lots of water helps also curb the hunger as well as keep me focused. I don't know if there is a universal answer, just my experience. I don't sleep any better or any worse during versus before the diet. And actually, I've wanted to go to bed earlier to so I can sleep through the hunger rather than be awake to deal with it. Four, almost five weeks in, I don't have any mental hunger any more, I still have some occasional physical hunger, but its timeline varies. Somedays I feel like I could go all day without eating, somedays two meals isn't enough. I always stick to two meals a day: one breakfast, and one lunch which eventually moved back towards about three hours after normal lunchtime.