Write academic papers. There are lots of people, from middle school students to people working on their doctorate, who have more work than they can handle. You can get paid to do it for them! Writing other people's school papers can be a great way to make money if you're a good writer and willing to learn lots of different subjects. There are many companies that provide this service for which you can work if this is what you want to do.
Get-rich-quick schemes and fad weight-loss diets are naturally popular because they satisfy the id while also attending to the super-ego. The ego's job is complete when it sees something like this. The appeal of "fast'' stems from the innate desire for instant gratification, so beware of what seems too good to be true (they often are) when you're looking to make money quickly. Be wary. Listen to the conversation deep within the confines of your mind and do your best to tame the proverbial beasts.
Make a realistic schedule that works for you. Some home-based businesses are based in the field whereas other home businesses require work output through the computer. Regardless of what kind of home based business you run, you need to understand that the days of three hour lunches on the company dime are over. You are in charge, which means you alone dictate if you are going to make money or not.