A military Alice Pack complete with sleeping bags, mess kit, first aid, sleeping bag, tent and winter gear for the cold months, matches flint etc. I keep an entire box of MRE's and a few cases of water and a full camel-back prepared in my closet. If something were to happen when I'm not home I'm going to be sure to run home as quick as possible. Something to take into consideration during a zombie attack would to get a four wheeler or a dirt bike, traffic will be horrible during times of panic so this may be the best way to actually get around. I'm currently saving up for a new .45 pistol to keep in my truck during such occasions, odds are you just may have to desert your vehicle and flee on foot away from copious amounts of attackers/people getting attacked.
If these are the standard 'slow zombies' you'll just have to worry about being surrounded by the masses, but if they're fast like 28 days later you're basically screwed unless you're a very stealthy person. Remember to be as quiet as possible as you try to make it back home. After I have my gear loaded up make sure you have some fire power. Hopefully I have my .45 by then but I have 1 Remington 870 express, 1 Mossberg 500 pump-action 12 gauge shotguns, and a tactile police issue "pig" shotgun, this bad boy has a collapsible stock and a 18" barrel with a nice large flashlight attached at the end of the barrel for those future night fleeing sessions. I've stocked up 00 buck ammo, because lets face it, what the hell is bird shot going to do to some zombies? I also have a AR-15 take as much guns/ammo you have in case you run into people, keep as many people around "especially hot chicks" but every person you run into will need to be completely searched for bites, scratches/bleeding. So when it's safe each and every person will need to be completely naked, this is to ensure your own survival. Keep the weak and slow as well if things get hairy you can use them as bait.
Gear is a main factor, in my pack I have lots of winter gear, safety glasses and a face mask you don't want blood to get in your eyes when you're smoking zombies all day or you'll be one yourself. No fluids shall be exchanged with the living and the infected. You have to have balls to shoot anyone that has a cut or bite on them, no matter who they are. Your closes friends you can trust, if it's really just something that happened while fleeing or not, I'd expect someone to put a bullet in my head to save me from being one of the undead, especially a close friend so you've got to be willing to do this for your friends/family. Who cares about people you do not know, eventually you'll be so hardened that it wont matter. Just remember about future procreation, so if the zombies go away somehow, you'll have to keep the race going.
It's always nice to have a group of friends that know exactly what's going down so everyone can meet up and rob the hell out of the local gun store, find a good place to shack up for a bit I have a place in mind but I do not want to disclose the info. If there are copious amounts of zombies and your will is broken, just simply shoot yourselves there is no point in going on if you have no will power so stay strong. Good luck and I hope everyone has a plan soon. Remember we will need engineers/computer techs and everyone needs to know their environment. Who know's you could be the person to get the internets going again, along with the power grid to re-establish communications and save mankind!