Here's the breakdown of what I use my devices for:
Mac:
- Papers
- Keynote
- Web Surfing (Data-heavy, non-touch friendly sites)
- Video editing, Photo editing
- Watching TV Shows (from other sources, if you know what I mean)
iPad:
- Netflix, Amazon Video, YouTube
- Safari (recipes, DIY projects and howtos, News)
- Social News (FB and Twitter vis Instapaper or Safari)
- E-mail
- Light productivity (keynote, pages, pdf reviews etc.)
iPhone
- Social Media (Snapchat, Vine, FB, Twitter, IG)
- iMessage
- Photography
- Spotify Music
- Mobile Internet (duh)
- Mobile Phone (duh)