"Write. Write a book in the next three days. You can write a 30 page book about dieting ('100 ways to Lose 100 pounds') and put it on sale on Amazon in one day.

"Write. Write a book in the next three days. You can write a 30 page book about dieting ('100 ways to Lose 100 pounds') and put it on sale on Amazon in one day. Why not?" ...because you aren't a professional writer? It takes time to learn to write well. Spend the 3 days learning whatever the latest skills are in your area of expertise, looking around, seeing whats going on, assessing opportunities etc. Don't try write some rubbish book. Unless you were a painter, you wouldn't listen to someone who told you to make and sell an oil painting. Not a fan of this list.