Leave the jar on it's side in the dark. Within two days your seeds should begin sprouting. It is important to keep the sprouts out of sunlight if you want white sprouts. Sunlight turns the sprouts green. Green sprouts are great for salads but are VERY sweet.
White sprouts are better for use when adding to bread because of their light color.
Even white sprouts tend to be sweet and should be substituted for some of the sugar used in the recipe to which you are adding the sprouts. For sprouts you are going to cook, let the sprout grow only as long as the seed. If you expose your sprouts to sunlight they will turn green. A content dramatically increases. When your sprouts have grown to the desired length, rinse them again, then put them in a sealed container with something to absorb the water on the bottom and store them in the refrigerator.