Just a quick reminder that occurred to me today.
Always remember to use the appropriate tool. Don't be afraid to split your data across multiple apps and inboxes when appropriate.
For example, I store all of my action items and tasks in OmniFocus. But last night I remembered I needed to buy water at the grocery store in the morning before work. I could have put that into OmniFocus, but I wouldn't have checked it early enough in the morning as I don't do my daily review until I'm at my desk at work. Instead, I used Siri to create a timed reminder in iOS's native Reminders.app to alert me in the morning so I'd be sure not to miss it.
That's just a long way of saying that it's ok to split up your data when it makes sense. It's better to have a few different apps that you use at the right time than one app that's only used correctly some of the time.