Lovely Ep !
*Raises hand* My name is Anthony, and I'm prop and handout junkie.
For me, great props and authentic handouts really draw me into a game; it's worth saying though, they're not actually essential.
Many moons ago, I used to sometimes run games in my parents shed, a big, eerie thing that you could fit 10-12 people into, and in said shed was an old bureaux/writing desk. During one of my very early forays into the world of Cthulhu, I guess mid-eighties sometime, I had the idea of actually using the desk as part of the game. I set it up like the desk in the scenario I'd written; hid things in the desk where they were in the story, and duplicated the items in the desk.
Come the point in the game where the players were in the study and announced they were going to search the desk, I proudly indicated the actual desk and suggested they 'search away'.
The first thing, the literally first thing they found was an old receipt for candles .. That I had not put in the desk.
It was tucked away in one of the drawers at the back and, despite my protestations, the players began hunting down candlemakers all over the game world.
These days I would just switch tack and adjust accordingly, as a callow teen I floundered horribly for a while.
There is probably a moral here somewhere, but I cannot put my finger on it!
On a more practical note.
If I am running a campaign that is puzzle heavy, I break the clues down into 'table' clues and 'downtime' clues. Anything simple and/or imperative I give the players in session; anything more complex like cyphers etc I tell them about and put it into a shared Dropbox folder. The players can then spend as little, or as much, time they want to in solving the puzzles between sessions.
That helps keep the balance a bit.