Almost each and every of the PCs and NPCs in our "Vampire" Campaign gets his own picture. The search for a fitting actor, artist etc. is actually a bit like the casting process of a movie - "yes, he looks good, but do I believe him to be a Mafia don?". Meanwhile we have some 900 MBs of jpgs to fall back on, so for every role there surely is a pic to use.
We try to avoid the "Tom Cruise problem" described in the column by mostly using (yet) unknown actors and actresses, supporting cast of movies and the like.
During the 10 years of our campaign, we have used almost every prop and handout imaginable. Letters and other documents (the best things I ever created was a 20 page transcript of an interrogation by the Inquisition which took the players quite a while to analyze, and an ancient looking arcane scroll which was so genuine looking that the players - not the characters! - barely dared to handle it), specially prepared and mixed sound effects, PowerPoint presentations (one was even designed to look like a police database and could be used by the players to retrieve important information), coins, daggers and what not.
But we have also coined the term "to do an Emmerich", referring to Roland Emmerich, director of movies like "Independent Day" and "The day after tomorrow". "ID4" and "Day after tomorrow" are fun to watch, no doubt, but sometimes the special fx overwhelm the story. So, whenever a Storyteller, Gamemaster or whatever you may call the devine power that runs a game hands out props, documents and the like en masse to distract from a plot hole, he's "doing an Emmerich".
To keep a long story short: Use props only to support the story - don't rely on them as the foundation of your game (and believe me, this happens faster than you think; I know what I'm talking about, because I did
a lot of Emmerichs...

).