r                 -> Refresh unread counts
u                 -> Hide/Unhide the sidebar menu
s                 -> Toogle the star on the selected item
t                 -> Tag the selected item
m                 -> Toggle the read/unread state
j                 -> Move to the previous item in the list
k                 -> Move to the next item in the list
space bar         -> Move down one page
Shift + space bar -> Move up one page
o                 -> Toggle the open/close state for the item
Shift + a         -> Mark all as read
g + s             -> Go to the Starred items view
g + t             -> Allows you to navigate to a tag by entering the tag name 
g + h             -> Go to the google reader home page