1. Go nowhere before asking local advice or take a reliable guide or local person with you.
2. Seriously avoid dark streets if walking and even better, avoid walking at all.
3. Tipping in restaurants etc. is adequate at a basis of about 10% on Bill Value with extra service worth a small % more.
4. Use a tour guide so you know what you are looking at especially in Game Reserves.
5. Never flash your wallet or money in public, avoid carrying large amounts of cash and keep cameras discreetly out of obvious sight to avoid looking like a tourist.