If your travels have made you an absolute pro in a particular place, then go ahead, take it a notch higher and get into the business. Being a foreigner to the land yourself people will feel comfortable in front of you, unlike locals (who are quite judgmental).
Know more: WikiHow gives a sweet guide for How to Be a travel Agent
10. Photograph and Film
If you are pretty good with your camera skills then you can record footage and get pictures of all the places you travel. Initially you can make money from selling them to tourism companies and on internet, but slowly proceed to make your website and/or YouTube account. If you are good and have an original vision, you might just make it big on YouTube and if you don't want to be a superstar then small term plans such the former work pretty well too.
Know more: Here are some tips on How to Make Money from YouTube.