[fencepost]

More years ago than I like to think about while I was working corporate, I threw together something to track my active window titles. That may not work to track vim in tmux, but I'd you're doing anything with website development it should give you a decent overview (which may also surprise you and motivate you to change your habits).

[_neil]

There's tools for this like RescueTime. There's also Editor plugins like WakaTime that just track the time you spend on specific projects within your IDE. Not sure if they have vim options, though.

[karlmdavis]

On Windows, Manic Time does a beautiful job of this active window tracking. I haven't found anything that does it for Linux, though.