I had a minor fascination with "life in the 70s" in Ireland. I wanted to know what sort of life I could have if I was sitting catipulted back in time 50 years. What would I eat? How often would I wash? What job would I do? What would everything smell like (smoke and B.O. I'm willing to bet). If I went to my local grocery, what could I get?
You'd think that this should be easy to answer but it really isn't. For example, you might think that you could just search for music created prior to 1975 and that's the list of music I'd listen to. But it isn't. I can remember how insanely hard it was to get a copy of something, even in the 90s. I wanted a track by Nirvana called D7. At the time I was searching for it, it hasn't been released. I heard it on an obscure pirate radio station. I eventually found it while visiting London, inside a huge HMV store, in the ridiculously expensive imports section. The single was more expensive than two regular albums. So the actual list of music that you might reasonably hear, or hear of, and then to be able to get... It's pretty tiny.
Similarly, you might be able to get your hands on mangos, chilis and spices, but not in my old town. You'd be lucky to find peppers.
I found a jigsaw puzzle, "brands from the 70s", which has all the most popular supermarket brands you'd find in the UK & Ireland. My mother spent 10 minutes looking at the photo on the box, stabbing the various items with her finger, saying "Oooh, I remember when the packaging looked like that! And those sweets! You can't get them any more!" and off she goes, remembering some story from her childhood in the 60s... some old man who used to call into their house for a chat on his way up the road, and would have a bar of Fry's Chocolate Creme to split between 5 kids...