I keep my dice in one of those CostCo size Jelly Belly containers. If i have to seperate out any sets i put them in the undersized measuring baby bottles the hospital gave us when we brought our son home from the NICU. I also use a "sample" container for a load of D20's.
i use pringles cans for all kinds of things. part of being me is having lots of different pens and a ton of pecils around. nothing says security like a pringles can full of presharpened pencils
dice do well in them as well. and make a great percussion instrument if you happen to be overcome by a samba band en route.
pack on with spare paper and a character sheet and you have a small triad that has all your game stuff.
strap together with tape using styrofoam bracers so that you have good spacing to let the lids release and you have gamer goodness.
My girlfriend works at this place where they make vinyl signs. She was going through their different corprate logos and the like. Anyhow she found a Autobots logo, Deceptacons logo, and a Quake II logo. They now reside on my gameing binder.
I got a big blue-and-gray Ralph Lauren Polo Sport box my aftershave and cologne came in. I keep my dice in it, and I also use it to roll in (we game around a coffee table, where dice are likely to bouce off).
I use a velvet bag for my dice, got it from work when they gave me a travel mug. It's like a Crown Royal bag but much more durable since it's lined with vinyl or something.
I have a Final Fantasy 7 laminated mousepad that I got for preordering the PC version (I didn't actually buy it but hey they gave me a bunch of free stuff) that I use as a dice rolling pad. My dice are always happiest when they have a cool surface to throw themselves down upon.
As a player, I only count rolls that stay on the pad. When I DM, I only use it when someone starts trash talking my bad guys. That's when the 20's really start flying.
I have the aluminium washers I use as coins in my games
Then there is the lidded jar my ex-fiancee threw for me that now holds my dice (The Canopic Jar o' Dice)
A piece of driftwood about 18" long that has a suggestion of a face that serves as sometimes magic wand prop and other times as the Talking Stick (to enforce who may or may not comment during a game session during tricky situations)
Of course my computer is technically not a game item, but we'll let that pass