
For the Nest of Envelopes, I need to figure out what is going to end up inside the envelopes. I’m thinking that a choice will be made as each envelope is opened. And those choices will narrow it down to a single thing. Then that single thing or representation (i.e., picture of it) will be in the innermost envelope.
While I hate for this to end up being a card trick, it looks like it will be. A deck of cards lends itself to being a group of items that can be grouped in a lot of different ways that are easily remembered. You can give people choices like: color, suit, letter or number, odd or even, male or female, exact value (i.e., four). A performer friend and I sat down and tried to brainstorm different things that could be grouped in different ways, hopefully four or five groups. We didn’t come up with anything that was good or easy for a person to understand.
If the trick is going to end up being a playing card prediction, then the obvious choice is an invisible deck. I travel with Rough Stick, so I quickly made an invisible deck:

I don’t know if this will be the final method, but it’s nice because it’s self-contained. The deck can go into the smallest envelope, and I don’t need to add or alter anything. Just open the envelopes, and when we get to the invisible deck, spread it to reveal the selection.
-Louie
