Take two wallets, if you get robbed give up the false one with few $ and a few old cards etc, old broken phone worth having too maybe. Keep the real goods down in your money belt below your other belt line.
Dont go to local smaller boxing matches.
Be prepared 100% to pay a bribe if you are pulled over, deal with it before you get to the station cause the closer you get to there the more it will cost if you get locked down it will cost others in your home country.
If shopping make sure they dont turn their backs on you when wrapping stuff up cause you wont get what you paid for, it'll be a shit version.
Sorry about the survival info mate, but VD is bang on and when you are knowing, they somehow know you know as your eyes meet and then they go for some clutz instead of you.