I make it a point to eat street food as often as possible whenever I travel in third world countries. Having just returned from a month in Mexico, I can assure you that I took advantage of the nearby food carts and taco trucks for lunches and dinners several times a week.
Contrary to popular belief, street food is usually fresher and prepared in a more sanitary manner than the food you will find in the tourist restaurants. Read the article for some tips and then go get some street meat!
How to Eat Street Food Without Getting Sick
How can you pass up a Belgian fry truck in Playa del Carmen?
I had to draw the line at the dude selling sushi out of a cooler from his ATV on the street. Not quite that adventurous.