iOS/Mac: Day One recently went through some big changes in an update, and it turns out that was at least partially to add in some more features. The first one on the list is If This Then That integration.
Day One works with a ton of different services on IFTTT. You can set it up to automatically save new Instagram photos, save Tweets, keep a record on any YouTube videos you like, and tons more. The nice thing about this is that with Day One 2’s recent addition of multiple journals, you can send all that data to a specific journal so it doesn’t clog everything up. If you’re journaling with Day One, this integration should be a fun way to automatically track all the stuff you do throughout the day.