Similar to the question about being on vacation, there are times when I'm just really busy. Most of us go through periods like this I think, yes? With work, family and the such.

If I have a goal of constant improvement, what's the minimum I should aim for on days when I'm so busy that I'm tempted to skip practice altogether? What's the minimum time that can keep the fingers limber, and my brain in that learning-space so that my overall progress isn't injured too badly?

Thanks for any advice!