Try to make the changes to you lifestyle and eating habits that will support your decision to flush. Also make sure that your kidneys a flowing properly and if you have any doubts about this consider a quick kidney cleanse as preparation for the liver flush
A key factor is reading and self education.
To start with keep everything as simple as possible and moderate. If you can tolerate the Epson salts and the olive oil potion then they is little point in changing very much. Take a tolerable dose of olive oil and lemon/grapefruit juice 3 to 4 fluid ounces of each is fine to start with. If you don't have any adverse reaction then you can keep things just as they are and gradually increase the dose of the olive oil to your tolerance level.
Ginger in almost any form either added to the flush potion or taken separately has proven almost universally to reduce the effects of nausea if you suffer from it.
Apples in any form have been proven to be very beneficial and the malic acid is reported to soften the stones. Pectin present in apple binds cholesterol in the bile so that it can be disposed of normally in one stool which triggers the transport of fresh bile in the liver.
Some herbs like turmeric, dandelion, Black-Walnut are reported as increasing to flow of bile and if added to the potion can amplify the effects.
The result of the flush can be very variable for a number a reason so patience and self belief are two more key factors in liver flushing. There isn't such a thing as a perfect flush; they are all successful in their own way and contribute equally to procedure of Liver Cleansing that may require any number of individual flushes.
You may like to protect you bottom with some Vaseline or herbal balm form the ravages of the many calls to the toilet on the second day.