Just to share with fellows, here's a marketplace for those who need some extra earnings - Also it would work travel and international minded students. There, you can be a local guide for visitors, show them your local town and neighborhood, restaurants, clubs, historical venues and so on. If you have additional ideas for new usage such as to offer a ride, language exchange or maybe playing games with strangers, ideas can be up to you to find and offer.
Search "Shiroube" on Google, Enjoy!