If you have a knack for teaching and if you are an expert in some subject, you can become a tutor online for students. There are tons of websites like TutorVista or Tutor.com where you can try out this. You would need a great internet connectivity for this. It can work best for someone who is ready to work late in nights as many students from US and Canada would be right fit for you then.
Portfolio income can come from multiple sources – interest/bond coupons, stock dividends, financial strategies including derivatives and capital growth.  Each offers some cash flow and some also offer potential capital gain with some risk from liquidity and volatile prices.  In this low-yield environment, many investors rely too heavily on cash flows and to pursue this are venturing further into riskier areas than they’d normally consider.