I think I flipped through the manual of the Legend of Zelda on nes multiple times. The artwork in that thing is so great and all the lore and information that was in there was awesome.
Pffft they came on cassette, there was no room for books! Mastertronic and their 99p games were amazing, the picture on the front was always the biggest lie ever
I remember when you had to spin the wheel to get the current code to unlock the game. No, I don't miss that.
What I miss is having less responsibilities, while at the same time I don't want to have less (and I always wanted to get older as a kid to be more in control, so I doubt I would like it now).
Now I work a bit to hype myself up about games. The game's wiki usually has a good synopsis and some wallpapers. There are promo videos, and often a promotional website. And the flow of memes and *ahem * fan art coming from new game releases is often also helpful.