Telman´s advice is the best! Would like to add, if I may (since I do not have much experience with flushing the gb/liver and am a newbie at this!):
look into the herb Chanca Piedra - it´s well known that this herb softens gall bladder stones and even cleans the kidneys besides being a super incredible herb for other ailments (google it). This should be done prior to an actual cleanse - there are many incredible postings on this forum, helping people to get started - you will need to do some researching!