Whether at home or abroad, when you know the ins and outs of a particular location, you can provide photography tours and location-specific workshops to serve both tourists and serious photographers. In Greece I found a professional photographer offering pricey photo tours in Santorini, a popular island with stunning viewpoints that are difficult to locate. Part of this photographer's service was to unveil these secret locations. Back in Holland, photographer Michiel Buijse offers nighttime photography workshops in Amsterdam, helping photographers shoot stunning long exposures along the historical canals. Consider what you can offer in a location you know well.
When you travel, saving money is often the exact same as earning. Quite often, exchanging a couple images with a hotel for a free room or a tour company for a free tour is totally worth it. In fact, when I was in Southern Africa, I did this a lot. Safaris are expensive, so I’d create a couple images for a company to use for their marketing purposes in exchange for a free safari. It really is win-win.
Make use of people to give your images life and scale. If the facade of a particular building appeals to you, the picture may be that much better if you show people walking in front of it. They will give it scale and also let viewers know what sorts of people live there, how they dress, and the like. An outdoor café may be more interesting crowded with people than empty.