Ive become a fucking pro at squeezing as many tasks into a day as I possibly can. I frequently get told they have no idea how I keep on top of things. I basically work 2 and a half full time jobs for people at the same company, and I accomplish it by overlapping my time and billing per item not per hour
I book service calls (repairs). Between calls and especially using my hands free while driving between service calls, I return phone calls and texts. When I get where I'm going, if I'm ever early, I respond to emails or place calls. If I finish a thing early or ever have to wait for people, I return texts calls and emails while waiting.
Ive also aced driving distance between places in the city where I work so I'm able to build a solid schedule without running behind.
At night, to clear my head, I schedule a bunch of texts and emails to send off first thing in the morning. Gives the impression I'm working even though I'm probably still asleep.