I don't know how penny flippers do it and I'd suspect the majority really don't make money.
Buffett's way is really the only way, unless you're a hedge fund manager trading on inside info, but then you'll be indicted.;-)
Regardless, yes, love 3M. His Berk B is starting to come close to outperforming my Apple and FB holdings and I can sleep easy each night knowing I own 3M and Berk B - for the most part, anyway, haha.