to Me the best Idea will be if you are working hard in your area of expertise, that will bring you more money in less time , rest all is going to just waist of time . hope the answer your question.
It's really all about mindset + certain skill + knowing how to sell. Methods and get-rich-quick schemes won't bring you far. Longterm businesses are the way to go.
Resell Vegetables which is very easy to sell than doing affiliate marketing and more profitable with amount of money invested than running a full fledged hosting Data Center to host big websites. Or setup a premium Burger outlet which pays more than a web developer gets paid with any projects hard to come these days.
How rich is rich to you? If it is just well above average it is easy. 2 realistic steps to make well above average (to be done together): -Uber pays relatively well in peak hours, so do uber during the peak hours, or a flexible freelance/part-time job that pays well. Even a valet driver at a prominent location can be paid very well because of high tips. -Find highly sellable products, import them in bulks from alibaba, and sell them online I done things like that and now I'm earning the income that is classified as "rich" in my Country. Best of all, it have taken less than 6 months One more thing: Of course it takes ALOT of hard work.
The quickest way to make a lot of money is to help a lot of people. The people who make the most money are the ones who figured out how to help the most people quickly.