when I have too many different things to do that sitting for meditation and doing a little asana is most important. We always have 25-45 minutes. It is just a matter of understanding where they are and how we want to use them.
Having sat sweetly for 25 minutes, I am calm and relaxed as I get ready for work, take care of the garden (if only it would rain), wait for a meeting with a contractor, etcetera, etcetera.
I do not believe in using the benefits of practice to enable multitasking, but on the days when everything coalesces in a less than optimal way, I am grateful for the calm center it provides.