If you think about it, at one time or another we've all been lazy and thrown away something that we could have given to Goodwill or recycled. If we've done it, think about the people who don't watch their finances carefully. Dumpster Diving can also be profitable. You can make money with everything from aluminum cans to items that can be resold at garage sales. If you are going in the evening, you are going to need something to light up the dumpster.
Some people carry a small flashlight.
They attach a cord to it, and then hold it in their teeth to keep their hands free. You can find them at reasonable prices in the bike area of discount stores. You need something to pull the stuff to you- some kind of pole with a hook at the end. A hoe works. You can also buy long poles that will pick up a quarter in the corner of an empty dumpster.