When you are investing for cashflow. Learning is a never end task. You are always reading and scan books and article looking for the next great tip to help amass your cashflow income. Passive income investing is very boring and time consuming but very rewarding. Right now I am learning about trading options. It's a great way to protect your dividend paying stocks from down turns in the market. If you want you can speculate on moves in the market with less money then buying stocks. Leverage is beautiful when used correctly and brings you income or growth.
Another great quote Pistol Pete Maravich, carried a basketball around with him 8 hours per day from the age of 12 until he reached the NBA. When asked why…"You don't get here by just wishing".
Never stop learning and researching because you can't know everything.