By the time the kids crash and emails stop, I get a 20 minute window while the dishwasher screams. Keep it stupid simple and cheap so you actually sit down because fancy setups die on day three. Set a 5–10–5 timer split: ghosted and straight lines and boxes and ellipses & then shade one sphere or cube. Date each page and snap a weekly photo so you can spot cleaner lines without obsessing.
One pen, one pocket sketchbook. Set a 20-minute timer: 2 minutes lines, 3 minutes circles/boxes, the rest one object on your desk. Same seat, same time, one page max. Track with a wall calendar X; miss a day without drama.
