Group Survival
If possible be with people you know, this will increase your chances of survival and lessen any problems rising up within the group.
It is important that people within the group have individual skills and can also teach said skills to others. Fighter, medic, cook, and scavenger are the most common named skills seen.
Fighter: Melee would be more important than a gunner but classing in both will guarantee and all around defense. Gun ammo may be scarce if you can't find a gun store or a military armory. Also guns may attract zombies that will be covered I the zombie classification and observation chapter. Swords should only be used if you are already skilled with that weapon. Machetes, crowbars, and axes are the best quick learn weapons since they have multiple uses.
Medic: It's good to have at least one of these, but the more the better. It is also important that medic has some knowledge of herbal and folk medicine, since pharmaceuticals will be scarce.
Cook: A person can last 3 weeks without food. Food and proper nutrition is important to have the energy to move and fight. It is also important to know how to proper prepare food in order to prevent food based illnesses such as salmonella and E. colli. Be sure this person knows proper cooking temperature in which the germs die at; there are thermometers that are not electronic and can accurately measure the temperature of the meat.
Scavenger: A person can only last 3 day without water so that would be the most important resource to find. As scavenger job would be to search and map the area for supplies and if possible bring back to HQ. If possible find a map of the area and/or state, it will make navigation easier. Especially if satellites are out GPS will no longer work. This job holds many dangers if you are not skilled in combat bring a fighter with you.