'Screenshots'
how to screenshots!
TLDR: OSX/iOS makes basic screen shots super easy.
Cmd + Shift + 3 for a full-screen grab Cmd + Shift + 4 for a crosshair, then drag and drop a box, OR #protip hit spacebar and click an app window to grab it as-is
Screenshots default to saving to your desktop, but you can customize the destination directory. Mine points to a dropbox folder.
Hard mode: screenshots larger than the window/screen (perhaps a long email you want)?
Also: Cloudapp/up for rapid screenshot sharing