Before the days of fast internet access, I eagerly made copies of interesting technical articles. I even bound them up using "stab binding". However, the way they piled up was a depressing reminder of all the knowledge that I was never going to take time to investigate. Now that the internet is here, I find it much more efficient to only keep electronic copies. When I build a new computer, I copy the articles on saved on the old computer to a DVD. Then I put the DVD away and never look at it. This is much less trouble than using hard copies.