If you want to reminisce about the days when all your tech info came from monthly magazines, you have two options. One, you can track down a dusty collection of, say, CU Amiga mags, perhaps in your own (or a friend's) garage. Or two, just hit up the Internet Archive, which has a healthy collection of digitised periodicals, with a focus on computer and IT-related topics.
The archive is extensive, if a little deceptive. For example, while there's an entry for Nintendo Power, no issues have been uploaded. On the other hand, The Bell System Technical Journal has over 4400 items.
With 116,853 entries and counting, you're sure to find something that brings back warm and fuzzy memories of the 80s and 90s... like, uh, PC Action.