work on one screen, communication on the other.

Browser on first, Sublime on second.

First screen: Sublime, Firefox, Outlook, Comps/Reference materials

Second screen: Chrome & Dev Tools, Lync, Git, Terminal

First screen, second space: iTunes

first work photoshop window, secondary dublicated PS window 100% view

Primary Screen: Doing. Secondary Screen: Seeing.

Usually I fullscreen applications on my primary monitor (Axure, Illustrator, etc) and floating reference material (browser, live prototype, inspiration, data, information) on the second. I use this in combination with lots of dedicated "Spaces" or additional desktops. I'll have different applications fullscreened on each of the primary spaces, for example:

Space 1: Browser for email+Jira+Calendar.

Space 2: Illustrator.

Space 3: Axure.

Space 4: Chat clients.

This helps to keep everything nice and neat in my head since each of the programs consistently live in their own place. The same goes for my secondary screen so that I can dedicate spaces for various projects. Nice for when I want to fling some stuff to a specific project for reference later.

[edit: woah, wonky return formatting. :(]

Currently working on eight displays, usually set up more or less like so:

1. SQL Server Management Studio
2. Coda
3. Chrome (& iOS sim)
4. Chrome Devtools and Slack/Email/Spotify
5. Either AJE or Sky live stream
6. iTerm with Grunt
7. Clock and vTop
8. Norwegian news channel TV 2 NK live stream

Keep an 11" MacBook Air on the desk as well, usually for testing websites on smaller displays, or to keep reference docs on.

First Screen: Sketch Second Screen: Chrome, adium, mail, Rdio. Third Screen: iTerm, Sublime.

Most of the Adobe panels in Photoshop, etc. Gives you much more canvas space and you don't have to minimize any of the panels you use often.

Outlook.

Finder.

First screen: SublimeText3, hipchat, TotalTerminal

Second screen: Chrome, VLC(movie as white noise), Messages, Skype.

I personally like to display the storyboard preview in the assistant editor of Xcode full screen in my second display so that when I make a design change I will see how it looks on a 3.5, 4, 4.7, and 5.5 inch display!

This article explains it: http://ijoshsmith.com/2014/09/27/maximizing-the-preview-assistant-editor-in-xcode-6/

I've dedicated my second display for very specific tasks. Mostly for file exploring and occasionally the browser. Might seem like a bit of a waste, but I have a 27" main display, so distributing tasks between multiple displays would only hinder my workflow.

My "extra" display (27" ViewSonic VA2703) is my primary workspace—Chrome, Sketch, Sublime Text, Github, Terminal, anything else.

I use my MBP display for Slack, Twitter, and 8tracks for Mac (http://8tracksformac.com/) all in displaying view all the time.