we're lazy here on tumblr.
press J: scroll down a post
press K: scroll up a post
press L: like a post
press ALT+REBLOG: reblog fast
press CTRL and the REBLOG button: open the post you want to reblog, in a new tab
press TAB: scroll to the top of your dashboard,
OMFG MY TUMBLING IS FOREVER CHANGED
Lazy? More like fucking innovative!