When I am terribly busy, I find it helpful to keep a running list of things I want to do - and this is the key part - broken up into groups of how long those things would take, and then organized so the most pressing things are at the top of each sub-list. Because when I have an unexpected free 15 minutes, the last thing I need is the stress of spending 10 minutes deciding what to do.

I am usually wrong about how long things take, though. It's usually longer than that. But it's a start.

I also forgive myself for just zoning out in front of the internet, as long as it's not EVERY time.