So I just spent 5 minutes playing a few scales. While I was doing that, I wasn't reading the book I'm almost finished, or writing in my journal, or thinking about side project I have going on, or emailing a friend that I haven't spoken to in a few months, or taking a short walk, or making a cup of tea, or making lunch plans with my wife, or sketching, or desoldering a bad relay in my espresso machine, or generally making 5 minutes of progress on any other hobby or project I have.

Now I probably won't touch my guitar again for another 3 months because the 5 minutes I can spare tomorrow will be spent reading or coloring a sketch I made or some other thing that I enjoy working on. You might point out that I'm wasting my time reading HN, but I get a great deal of enjoyment out of the things I find on HN.