Most countries, if your are in a public place, it's legal to photograph people for either editorial. However, if you intend to use any images in advertising, you need a model release form signed. Country's have differrent laws and regulations about this, research the country you are visiting before engage in photographing strangers in the streets.
You are more invisible on you own it's better this way to shoot street photography.
Hide in the crowd.
Start with a busy public place such as a street market or an outdoor event. You are more invisible in a crowd Street performers are excellent street great photography subjects to begin with. They are there to be seen and use to camera also part of the culture of the place you are visiting. Buskers are an excellent choice as they perform so shoot away, and be generous with your coins !
Standing and waiting
Find a compelling background be patient and eventually the right people will walk through your frame. If your on your travels let people were you are by adding land marks like architecture in the background or signage in the country's language.
It's important to make street photography an enjoyable experience, the situation dose not feel right or dangerous.
Trust your gut instinct
Interesting subjects if there easily recognized, people with umbrellas, bicyclists or lovers holding hands are terrific silhouette images.
B&W or Color ?
There is no right or wrong answer to this question its down to personal choice , I will say the advantage of the digital darkroom is the ability to convert to monochrome from colour. Your artistic eye be your guide.
Engaging a subject in a conversation some photographers find this intimidating than shooting candidly. Asking permission to make a portrait , if permissionis granted, take your time with the image show the picture on thecamera screen Tell them why they caught your attention.we all enjoy a compliment!
Be confident and respectful.
You are not doing anything wrong, if someone objects to having their picture takenstop shooting, be respectful of others avoid photographing people in embarrassing situations. It’s not worth an argument
If they are in a public place, you have just as much right to photograph children as anybody else, simplist way i find is show my camera and wait for their acknowledgement.
Copy of the photograph to your subject?
Occasionally I will interact with my subject,I try to stay invisible so they never know the image has been captured, Street portrait's engage in conversation, show them pictures on the camera back. If they ask for a print give your card and ask them to email for a digital file.
Editorial runs regular workshops: small groups and one to one Contact for more information