6. Teach online
There is a big call for English teachers these days. There are many companies on the internet that offer certificates such as the TEFL/TESOL English certification. This enables a person to teach English online or even at various schools abroad. The company you get your certification through usually offers both online courses to get the certification or even on campus if there is one in your area.
Once certified the company will put you in touch with various places that are looking for online teachers.
But English is not the only thing a person can teach online! Skillshare is a site where you can share your skills online and get paid to do so.