Only thing that I would add to the info above:

_ massage your leg muscles and feet for a few minutes before you suit up to encourage plenty of blood flow.

- make sure that you are not bulking up the layers on your feet to the point that you are constricting them and hendering blood flow.

- make sure that you are keeping your core (torso and chest) toasty. If not your brain will automatically start diverting blood flow away from your extremities as a part of its survival response. A lot of cold natured people actually have a higher temp/quicker trigger point for this mechanism than others.