This is very broad and the answer can be varied and limitless. Ultimately, this would depend on what you are interested in. For example, if you are interested in writing, you can write a story about your trip and your experiences and try to sell your stories. If you are interested in physical products, you can start sourcing for a product there which you would like to sell back home. If you are into teaching, you can provide tutoring services in English. The possibilities are endless. All you need to do is to figure out what your interests and skills are and go from there.