Here is my favorite combination:
A big plate of Kale.....
....an apple, celery (about 4 stalks), 1 beet and baby carrots. I had barely any carrots left but I typically juice a big handful of these.
You put these in the juicer. The apples and celery produce the most juice so put those in with kale and beets.
You now have a nutrient packed juice that will help flush your body. I also make sure to drink lots and lots of water. Sometimes I do this once a day and other times I will do this for breakfast and lunch.