The peanuts and sesame are placed last on the top of the other raw vegetables.
Every one grabs a pair of chop sticks and lifts up the ingredients and let them drop back into the dish again while saying "lou hei, lou hei" (lift up prosperity and fortune). The believers will of course lift up the ingredients so high. We keep lifting till the ingredients are properly mixed. It is exactly the same as tossing a salad except that in "yee sang," as many as 10 people or more toss the same salad together from one plate while shouting "lou hei!"
My family likes to toss to great heights that defy gravity in the hope for more luck. MartianGirl alway stands on her chair to compete with the adults. Whatever that falls on the table is returned to the dish and whatever that falls on the floor belongs to Demon K9. Although he does escape with some from the table too.