When it seemed like I was having a rough time from low blood sugar, I cut out certain things. Fruit juice was one of them. I like fruit juice, but I am much better off eating an apple than a whole glass of apple juice. It's the sugar of a whole bunch of apples but without the fiber to slow down the absorption in your system. Drink a big glass of fruit juice will make me insta-cranky.
Although it's somewhat scary, there is this awesome "diet cranberry" juice where they put in splenda instead of sugar. Even the "lite cranberry" is full of added sugar. That's pretty much the only time I drink fruit juice. Sometimes I water it down a bit because it is so strong and sweet.
Orange juice is so high in sugars (pineapple is worse, but not much else is that high) that it's what you give to diabetics who are in insulin shock.
Oh, and although I am mostly back on the sugar monkey, when I cut out white rice, potatoes, corn, fruit juice, sugar, etc I started being able to go 6 hours without eating and quit craving chocolate cake after every rice-laden asian meal. Being on a sugar roller coaster will cause you to eat more and more, particularly more and more junk food.