It depends, glasses+magazine is +3 int, which also allows you to learn perks that require that much int once you meet the lv req, so technacally you could use this to save 3 skill points, as there is really no reason to always keep your int maxxed, as it mostly effects stuff like crafting and the trader. I tend to keep my int 2 below my lv cap, and just use the glasses to gain that 2 I need when I need it, to save 2 skill points early game. Depends how much rng loves me though i've gone day 14 without finding the glasses once. Most people once they get a base don't really craft much on the fly, and if your like building a base you could put the glasses on for craft speed. Though the lucky ones might be better depending if its a double int level with craft speed or not.
Magazines I use the most and I hold onto are: master chef, I keep lv 1 in the perk, if I need to make veggie stew, I save up mats to make a ton of them, pop the magazine page and then queue em up. Again this is mostly to save skill points early game (below level 100) when they are much more tight.