Because attention – particularly your proactive attention – is truly the most precious resource you have at your disposal.
It’s important to note that everybody is different. We all have different preferences and biorhythms. For me, proactive attention is usually from 9am until mid-morning, and then I get a second burst in the afternoon. In recent years, I’ve also learned what’s good and bad for me to eat for lunch to avoid the inactive attention lull that I used to experience in the hour or so after lunch