A warm smile and a friendly "Jambo" (hello in Swahili) go a long way in creating meaningful connections. In Zanzibar, where the majority of the population is Muslim, please dress modestly away from the beach by covering your shoulders and knees.
When visiting Maasai, Hadzabe and other local communities, follow your guide's advice, respect your hosts' customs and traditions, and always ask permission before taking photographs. A little cultural awareness goes a long way towards making every encounter respectful and rewarding.