48 hrs of Intensive Pumping - straight after feeds. Highest level of Prolactin (milk making hormone) between 1am-5am so good to get one session in here. At least 8 times in 24hrs.
Use a double hospital grade electric breast pump - like the Bellema Euphoria Plus. This part is the key to increasing supply. If your pump is not effective at removing milk you will not increase your supply.