I’ve seen surveys on what people are doing at random times. Here’s one on what people desire at random times:

208 participants (66% female) … indicated at least one current desire on half (49.9%) of the occasions at which they were beeped and responded (N=10,558), reported at least one recent desire on 26.7% of occasions, and reported neither a current nor recent desire on 27.6% of occasions. The most frequent desires among the total of 7,827 desire reports were those rooted in basic bodily needs: desires to eat (28.1%), sleep (10.3%), and drink (8.6%); followed by desires for media use (8.1%), leisure (7.2%), social contact (7.1%), hygiene-related activities (5.9%), tobacco use (4.8%), sex (4.6%), work (3.0%), coffee (2.9%), alcohol (2.7%), engagement in sports (2.6%), and spending (2.2%; category “other”: 1.9%). …

53.2% of desires [were] rated as not conflicting at all, 14.7% as mildly conflicting, 12.4% as somewhat conflicting, 10.9% asquite conflicting, and 8.8% as highly conflicting. On average,desires were actively resisted on 42% of occasions and enacted on 48% of occasions. (more)