I'm doing this http://themastercleanse.org - it's about as shitty as it sounds.
It's really NOT ...
I've done it twice now; both times to support my girlfriend at the time, Brooke ...
Day 3, 7, 8, and 12 SUCK ...
I'll give you a hint how I did it both times ...
After you juice your lemons (I did lime), grind up some of it and make it "pulpy" ...
... it gives your body the illusion that you are "digesting solid", when it breaks it own to liquid anyway
and it makes it TONS easier to do; it's how I did it twice and got the same results as those just do "liquid only"