For years, whenever I played Vanadia, thief extraordinaire, I wore a pair of bronze earrings that were long slender daggers. Alacrity wrote in magical daggers for my character to find, one of which shrinks to an earring, so my character is never completely unarmed. Funny thing is, I sometimes wore them to work, with a corresponding boost to my confidence (and at a distance, they look like crosses, so it was my little secret).
More recently, friends of ours surprised us with sweatshirts to play D&D. Each has "+5 shirt of protection" on the front, and "They're not that tough" (the group's battle cry for over 20 years of gaming) on the back. Alacrity's shirt has "Continuing Where We Last Left Off" on the front, which is how he starts each and every session.
The original group drank mead out of pewter goblets, but the current group is both older and younger (our kids are now playing with us) so that's been set aside as a tradition, and we never did find the mood lighting useful (too dark to make notes, losing dice under the table, etc.)
When our two youngest players joined, Alacrity asked Almerin to design custom character portraits for them, based on their descriptions and character classes. I think that really helped hook our daughter and god-daughter into their characters.
Miniatures definitely help, and over the years, Alacrity has amassed an impressive (and frightening) array of monsters to pitch against us, so when he pulls out something really big and scary to confront our miniatures, chances are it's not standing in for something less deadly