OS X Yosemite and IOS 8 offer a handy feature called Handoff. This allows your Apple devices to hand off what you are working on to the other device without saving and emailing or opening up apps one by one.
If you start a document or email on your iPhone, you'll be able to quickly start with that when you turn your Mac On. The same feature works when you go from your Mac to your iPhone.
Handoff works on Mail, Safari, Pages, Numbers, Keynote, Maps, Messages, Reminders, Calendar, Contacts and developers can add support for this as well.