You can either organize a yard sale yourself (which is kind of a hassle), or better sell the items through ThredUp, which will pay somewhere around $2-$25 for staff from Gap, Banana Republic, H&M, etc. You can browse around to see how much different items are worth. The best thing about ThredUp is that all you need to do is pack your clothes in a box and then just ship it to them (shipping costs are covered by the company).
While it is possible to make a lot of money while working for someone else, the truth is that you should mind your own business. Start and grow your own business, no matter what it might be. Identify what you're really good at, and develop the skills into a business that you can expand over time. Don't look for instant payouts or overnight riches. The reality is that it's going to take time, so you might as well start now.
About the list, this is extremely helpful. I know some coaches who are already earning a lot of money and would choose to get paid for the information that they know but you, you choose to share it to everybody else free of charge. Be a proud brethren of Christ because this is his very attitude. I say this is an act of love. May it be returned to you and your family a million fold.
Websites like Care.com connect parents with babysitters. The company does all the background checking and other due diligence to put parents' minds at ease. Of course, you can appeal directly to people in your personal network, but if you're looking to generate recurring revenue sign up with a site marketing to parents looking for child care services.