These are basic hotkeys for noobs.
If your just getting started on the happy hacker, life can be confusing; I always forget these, so I'm just writing them down now.
Browser:
Toggle Fullscreen: ctl +cmd +F
Toggle Presentation Mode (fullscreen, no tabs): shift +cmd +F
Navigate Tabs: alt +cmd +arrow
OSX:
Application Tab Bar: cmd +tab
Swipe Displays: ctl +tab +arrow
Volume up/down: Fn +s /a
Volume mute: Fn +d
Tmux: cheatsheet
Default bind key (you can change this): Ctl +b
Vertical/Horizontal split: % /"
Vim: