If you get a boat - get a sail boat. Operates off of wind power. Get a map, a compass, and a hand powered HAM radio. Why a HAM Radio? They're cheap, easy to build, great range, reliable, and chances are your only forms of communication that will be prevalent.
A machete is great and all, but I'd rather opt out for a quality samurai ( katana ) blade - make sure it's a combat ready blade, not some joke of a pretty ooh and aah, that, or a monk's spade.
Don't be wearing a suit of armor. You want to be maneuverable. Don't wear baggy clothing either. I have a feeling the south side of Atlanta would be the first place to fall.
If you're going to be hauling around in a semi - jack a gas tanker - one that preferably has diesel for yourself, but if not, you can pawn off the gas for goods like food and weaponry. This is survival we're talking about.
Head towards more isolated less populated regions. Deserts, mountains - the frozen tundra. Always be ready to move at a moments notice - if you establish a place, you run the risk of an outbreak in your immediate vicinity.
Also, after watching the movie Zombie Strippers last night...
capture a few zombie hookers, and make them strip for money and goods. Guys will pay to see boobies no matter what.

Commerce is still a good thing to keep in mind to survive.
Also, back on the gas tanker - if you DO get one, make sure you recruit/save loyal people who will stick to your side, and create a convoy. You'll be in an apocalyptic world, but
keep in mind that not only will you have to be fighting zombies, human survival instinct will kick in and you may very well have to shoot completely uninfected humans. Think of a Madmax world meets Resident Evil/Dawn of the Dead/Land of the Dead.
Use fat people for bait. Unless they have a useful skill, or in some way can contribute to the group, then they get to be bait to distract say a horde whilst you pillage.