In 2014, I worked with a major car brand, a rental car company, and a couple tourism boards. So far, in 2015, I haven’t worked with anyone, though it’s mostly because I’ve been off doing my own thing. There’s a balance here between going where you want and where the money is. Unfortunately for the weight of my wallet, I’ve always just gone where I want and only take on clients like this if it’s convenient.
We often travel with people we know—taking a family vacation, for example, or bicycling around Tuscany with a group of friends. We quite naturally want to come home with pictures of them as souvenirs of the trip. Be sure to get these, but don't forget that you can also use members of your family and your friends to make your other photographs more effective.
As an approved photographer on stock libraries, you can possibly get access to client briefs where you can submit your work direct to the client, meaning they’ll consider you for the project and see your profile. Otherwise there’s usually a marketplace type system for you to upload your images and have them added to collections based on themes, destinations and seasons.
I have found Alessandro Bergamini's China gallery to hit all the right notes in that regard. Most of his images were made in Guizhou; a province located in the southwestern part of the country, and well known for its traditional rural villages, inhabited by minority groups like the Miao and Dong. Other images in the gallery were made in Guangxi , another autonomous region bordering Vietnam, and home to the famous cormorant fishermen of Guilin. I haven't been but I read that even though the water is too polluted now for fishing to be sustainable, these fishermen are catnip for many photographers, and earn their living in that fashion.