If you are tracking your time, how many hours of focused work are you doing per day on average?

What I mean with focused work is only the time that you are working. Not counting the time you take a break, not counting the time you go to the bathroom, not counting the time you get up to drink water, etc. If you don't stop your time-tracker during non-work activities, please mention it.

Some years ago, I wrote a book about telecommuting, including a section about the reasons people don't want to be remote workers. High on the list was, "It's too hard to move up in the company" because if you're out of sight, you're out of mind.

Well, now suddenly nearly everybody is a telecommuter, whether or not they like the idea. So that particular skill is particularly relevant. And I've been assigned an article on "How to 'manage up' when you work from home." I'd like your input.

My article is meant to compile practical how-to tips for people working from home on “how to stay on your boss's radar.” What advice do you have to share?

Ideally: Give me a bullet point (“Do XYZ”), why (“It accomplishes this”), and perhaps an anecdote sharing how it made a difference.

Please don’t expend energy telling me why it’s important, or what the barriers are. Take that as a given. I’m looking for solid “Do this” suggestions.