Growing up in the country, my family had a "fix-it" mind set that I've carried to my adult life. I almost always tinker with things that break, but many people don't. In fact, some people look at me funny when they learn I replaced a Krups heating coil instead of tossing the entire coffee pot and buying the latest cool technology. (Actually, I was amazed how simple it was and only cost ~$3)
But the 4th R isn't just a matter of changing a mind set, many products are not built to be fixed by their owners. In fact, electronics' warranties are often invalidated if the products are opened.
So what can a person who is green-minded do? Simple stuff. Watch for the availability of replacement parts, be willing to pay more for good quality products that are able to be repaired and avoid buying products with warranties that are voided if you attempt to fix them.
I look upon successful repairs as a fun way to save our dwindling global resources. Try it and share your successes!