Since consumables/usables has become such a big deal now I was thinking...quickslots for consumables!
You know those weapon slots, the consumable slots could be very simular to those. In the options menu (or where ever it sits best) you can decide how many slots you want to show on your screen, 0 beeing minimum and maybe 4 beeing maximum. You can then open you inventory and drag your consumable into the slot on the screen and voila, you have it ready for usage at all times. Shrugging off some DP, adding that extra armor, eating that yummy easter egg, adding speed to the entire party... All that with just 1 click without having to open your inventory, which can be somewhat stressfull if you're in a full blown battle and have to concentrate on surviving.
It would hardly take up any space on the screen and it's totally up to the player if they want it there or not, seems like a burden releaser to me

So what do you guys think?
Give it a thought ArenaNET!

/Andy