Graham Nelson — English Mathematician born on December 30, 1968,

Graham A. Nelson is a British mathematician and poet and the creator of the Inform design system for creating interactive fiction games. He has also authored several IF games, including the acclaimedCurses and Jigsaw, using the experience of writing Curses in particular to expand the range of verbs that Inform is capable of understanding. He has been described by The New York Times as "ornately literate.".. (wikipedia)

I don't really believe in 'directions' in art; the rope twists as you follow it, that's all.
For a fortnight nobody at all emailed me, or posted a follow-up. Doesn't anyone care, I thought? It turned out my newsreader was broken, and hadn't posted at all.
This means keeping many trails open at once, inevitably requiring a fairly 'parallel' plot. This plot should be discovered rather than announced, so show, don't tell.
If you're setting a game during the Cuban Missile Crisis, look through a library. find out what people were wearing, what other issues were in the news, how houses were furnished, what cars were being driven. Especially include things which now seem foreign.
Players very widely disagree with me about what's hard and what's easy. and in a way, 'I won, but it was a fight' is the best compliment a game can receive.