every weekend i read oliver burkemann's "this column will change your life" in the guardian magazine - so i loved this past weekend's column on using interstitial time and especially:
"Take inspiration from knitters, Mann suggests. Knitting fulfils the three criteria of a good interstitial-time activity: it's portable, it can be done amid distractions, and even a few seconds spent on it contributes to the end result. (That's not the the case with tasks requiring "set-up", such as waiting forever while Windows boots up on your laptop). Identify in advance which of your tasks fit the knitting criteria: those involving reading and (hand)writing are a good place to start. Or take up knitting".
read the whole article here