...i'm tempted to say physical dice, but in truth i have many sets and switch them out for each campaign, so my most-used accessory is probably my nice padded rolling tray, followed closely by my staedler stick eraser...

...my most-used books, despite my meticulously-curated physical and PDF libraries, have turned out to be the player's handbook and dungeon master's guide on DnDbeyond; i always keep them open on an ipad stand during gameplay because it's really tough to beat indexed hypertext for ready-reference during gameplay...my players use the heck out of my shared campaign subscription, but it's becoming tougher now that DnDbeyond defaults to 2024 rules, so that use pattern may well change as the platform evolves...

...even as a player, though, i feel like a good DM's screen might be quicker!..the problem of course is tabletop real estate, but it seems like there's an untapped market for player's reference screens during remote sessions, where most folks have more tabletop real estate to play with physical accessories...

...i'm considering crafting a player's reference screen with panels focused on core rules, house rules, and class rules which can be readily swapped-out...