congratulations on your flush! Like me, you'll want to repeat in 2 weeks until you see no stones for optimal health. The only thing I did prior to this flush was the parasite therapy, I didn't do the kidney therapy, and it's not a huge deal if it's not done.. the Liver Flushes are the most important thing one can do for their health.
Your diet shouldn't matter all that much if you are just working on your liver/gallbladder and not trying to detox, but I would highly suggest you completely give up hydrogenated oils (trans fatty acids) and Aspartame (nutrasweet) whenever possible to keep yourself in better health overall. More water will prevent kidney stones and help detox the body overall, as well.