Borrowed shamelessly from this
I thought I'd borrow it for wargaming purposes, since it'd be fun to talk about and honestly, the RPG guys tend to be better organized than we are.
I'd love to see more of you guys do the same thing.
So day 1: Dice!
Personally, dice are an absolutely physical thing for me.
If I am testing something at the computer, I have a text-console app (rolldice for linux) that can roll anything you plug in (in case you need to roll 3D17), but I always keep a few dice at the computer desk.
For actual gameplay, its real dice all the time.
Back when we played a lot of Crossfire, I even had allied and axis dice, speckled D6 in green and grey respectively.