Okay my advice
1. ALWAYS lock your car doors when stopped at a red light, or parked, or getting in your car.....hell just lock it PERIOD they have a HUGE kidnap and car theft industry over there....assuming they don't kill you when they steal your car.
Remember SA is where they invented the pedal operated flamethrowers to "deter car thieves" heh.
That brings me to advice #2: WHen asking for directions stay OUTSIDE OF FLAMETHROWER RANGE!
#3: DON'T go bathing in the local rivers/lakes whatever they have this nasty bug in Africa that swims up your.....ahem....manhood? And attaches spikes inside your testicles to hold on. (this is from the INSIDE BTW)
#4. Don't eat anything made with local water or plantlife it'll give you the runs at the very least.
#5. DO NOT travel after dark it's a great way of getting mugged/kidnaped/eaten by a lion.
#6 If your an American and are asked where your from say your Dutch or British and fake an accent do NOT say American. They don't like us. (oddly enough same rule for when your visiting CHina these days) Then again there are places in Africa where being white might get you into trouble so just be careful.
#7 Have fun but not too much fun