I haven't used my juicer as much as I'd like, but I love to. When I did not have that, I used my blender to make juice drinks.
One of my favorites (and it will get your enrgy level thru the roof !) is this: two stalks of celery, two large carrots or 6 or so of the little ones. (now you can also add Kale or Spinach leaves...but you don't have to, it's just a little more Green)...pink grapefruit juice and a little spring water...just eyeball it.
What it will most likely look like is either watery green "sludge" or a thicker concoction, all depends on how much liquid you added. I never really measured it specifically.
But ladies, even if the Green texture turns you off, it is Sweet and to Me, it tastes a bit like Bananas ! You really need to drink it down, not work on it over a long period of time.
Try it and get back to me about how it worked for you....I am curious if it affects anyone else the way it did me !
Happy Juicing !