Turning a color image into black and white can add impact.
4. Explore and plan
I recently visited the astonishing Plaza de Mercado de Paloquemao in Bogota, Colombia.
Thousands of Bogotanos do their daily shopping here, buying everything from fruit to seafood to other goods.
You won't find the place in most guidebooks, but I recommend a visit.
Doing preliminary reconnaissance allows you to find the most interesting stalls at what is a gigantic market.
Mapping out a route helps you prioritize, so you have more time to shoot.
5. Learn to use automatic white balance
Markets can present real challenges with lighting.
You might be shooting outdoors, indoors or both.
Here's a tip: it's much easier to deal with mixed lighting (tungsten, fluorescent, natural, etc.) on the front end than struggling to edit out those weird pink streaks on your pictures when you get home from your vacation.
My recommendation: choose automatic white balance on your DSLR camera.
Many point-and-shoot cameras also allow you to adjust the white balance manually.
The automatic white balance setting will allow you to shoot freely without worrying about changing lighting.
6. Buy something
A small purchase goes a long way toward making friends with vendors.
Buy something first, establish a rapport, then ask for permission to take a picture.
You'll find subjects are more relaxed and often more willing to do you a favor (pose nicely) after you've done something for them.