Earlier quoted context omitted.
John MacAfee has a great guide. Context is important. You need to know the situation, you have to be situationally aware. You can't just start showing money (maybe alcohol or other "currency" depending on their penchants are more apt). You have to know a bit about the locals. See http://www.whoismcafee.com/the-travel-guide/
Serious question: given how ... unstable ... McAfee seems to be, how reliable is this guide?
On a side note, when I was in telecom, My boss (who had been in the industry for 15 years) used to tell me about working for MCI and doing surveying and laying copper in several middle eastern countries. He told me some stories that would make the hair on your neck stand up.
He said it was an open secret that MCI was giving his team suitcases of cash to bribe officials and the military just to allow them to do their job. Stories of being pulled over at gunpoint, negotiating with military people and being able to talk through the process of a bribe was something he always maintained was part of the day-to-day survival game they played.