Some organized people don’t bother to keep instruction manuals at all (if a product even comes with printed materials). They figure that if they need to look up something, they can do so online.
Honestly, I find it easier to hand my husband a printed manual than the laptop. However, I have ripped off the non-English sections since I only need the directions in English. This dramatically reduced the space these manuals required.
You can keep the manuals with the product (if reasonable) or have a file or binder with all household manuals together. (If you use a binder, save yourself the task of punching holes and instead slide the manuals into page protects so you can access them with ease.)
Decide which are important to keep and when you get rid of a product, get rid of the accompanying directions.
Susan, chief (and only) organized squirrel at A Less Cluttered Life, pursues learning, practicing, and sharing information about the everyday habits that can lead to living a better life.