A high-fiber, low-fat, low-cholesterol diet rich in vitamins c and e will help prevent stones from forming.
Increasing the amount of bile produced decreases the chances of formation. And the greater volume is also more likely to flush out a stone.
A popular remedy is the leaves of milk thistle. These leaves can be crushed and consumed in the form of tea. The dandelion herb goes very well with milk thistle leaves and hence can also be mixed in your tea.