Beginners guide to hacking and penetration testing (2017)
Dumpster diving is pretty much what it sounds like, diving or at least digging through the trash of the target. You might be surprised what people will throw away (computer equipment, notes, passwords, confidential files).
When dumpster diving make sure that you wear protective clothing. A good pair of sturdy shoes, gloves, eye protection, First Aid kit, can mean the difference between injury and a good dive. Also you may consider wearing clothing that you don't mind tossing after the dive.