You can use your keyboard to navigate around the site. There are a few shortcuts:

Hotkey Description
Q Focus search field, if available
A and D, and Go to newer/older page or post
F Cycle post fit mode
E Edit post
P Focus first post in post list
Delete Delete post (while in edit mode)

Additionally, each item in top navigation can be accessed using feature called “access keys”. Pressing underlined letter while holding Shfit or Alt+Shift (depending on your browser) will go to the desired page (most browsers) or focus the link (IE).