It seems this thing is not mentioned by anyone anymore, except by myself and few others in chatroom sometimes. As a result, barely anyone has knowledge of it at all, even among experienced players.
So this thread is for all the keyboard shortcuts that leads to various pages.

M - Message inbox
N - Compose new message
H - Home page
Q - World page
WASD - World navigation
P - Profile page
B - Bank
I - Inventory/Backpack
] - Skill page
R - War Room/Raiding
G - Guild profile page
SHIFT + A - Attack launchpad
SHIFT + H - Player Hitlist
F - Forums
SHIFT + ? - Wiki page
SHIFT + C - Open up the main chat room window.
SHIFT + Q - Place listing

Sorry to interrupt, but perhaps today is a good time to add the rest of them We've been talking about adding more for months

I - inventory/backpack

cool