When going out onto the ice, follow a well used path if there is one. Don't go alone if possible & walk single file about 20 feet apart. Carry a 50 ft. length of nylon rope with you in case somebody falls through the ice. If you fall through the ice, try to stay calm & catch your breath for the first minute, before you attempt to get back on to the ice.
helps to bring a heater along too. also bring some beverages and depending how long you are out there bring some snacks also.(Don't forget the worms!!!!)
Dress in layers, avoid sweating when walking out onto the lake,and making a hole in the ice. Ive seen so many people do this and there cloths get damp and no matter how much outter clothing they have on they get cold after a short time after they start fishing... makes for a bad day out on the ice if you cant get warm