lets be honest. will smith did a good job in the movie, but his character lacked common sense. hopefully, this instructable should help you if you ever find yourself in his position.
Step 1: Materials
military vehicles: there should be plenty of humvees and tanks left in the city from the
former military presence. don't take the Robert Neville approach, and
take a crappy station wagon.
sports cars: leave the ford mustang. its not worth the repairs you will need to make,
especially when it breaks down miles from the shop. take a ferrari
guns: a sniper rifle does have its advanteges, but a rocket launcher works much better
for large groups. also, dont only take one grenade.
food: forget the food in stores, it will probably go bad in a couple of months. there are
probably plenty of military foods with a shelf life of about 30 years.
computer: dont use a macintosh.
Step 2: Food
for food, dont just go around to random houses and take their food. even if they are ether dead or infected, it is still stealing. also, you dont know how long that food has been there. for all you know, it could be years past its expiration date. usually, tanks carry excessive MREs for the crews, so of course, with the former massive military presence, there should be plenty of extra food.
Step 3: Keeping yourself sane
if you are going to try to keep yourself saner in this post apocalyptic world, dont surround yourself with dressing store mannequins. it will just add to the image of insanity.
Step 4: DONT TRUST FRED!!!!!!!!!!!!!!
if you feel the absolute need to have mannequin companionship, dont trust fred when he moves across the city. he is definitely working with the infected to kill you. look how well it worked for will smith.