The fact that we all have cameras in our phones is nothing to sniff at. It's the kind of clever technology that wowed us once upon a time...like Max Smart's shoe-phone.
The phone-camera is a spectacular tool for creating a visual diary of days. Set yourself the task of taking a photo every day. The simple act of capturing a moment makes us more conscious of our surrounds and of more moments that would otherwise have slipped invisibly away.
Transfer your pics (every week or so) to your computer, and see how the week went for you. It's pretty surprising looking back over months, a year...

Need further inspiration? Look at what this guy sees every day.