I've been experimenting with building a few 'life-hacking' tools that help motivate me and optimize for perspective in my life. One of these tools is a Chrome extension called Motivation.
Motivation replaces your new tab screen with a counter showing your age incrementing in real time. It seems to have a struck a chord--22,000 people use it weekly. It's a simple tool, but it helps me think about perspective a bit more, which in turn helps me optimize my time.