First in your new pot half fill it to the point where you think you'll want to put your other soil mass in, next water your soil to the point where you can see the water showing up on the top of the pot or w/e (of the pot your plants are in) then with your middle and index finger between the stem and the rest of your hand on the soil, turn the pot upside down and lightly try to get it out..once you do that put it in the new pot and put more soil in the pot to make a full pot or w/e..