I started doing that around in 2017 at my job. It was an office job. For work & personal tasks. I was using any random piece of paper, post it note, scrap paper

I started doing that around in 2017 at my job. It was an office job. For work & personal tasks. I was using any random piece of paper, post it note, scrap paper. Soon I ended up with a bunch of papers held together with paper clips because some of the things were not getting transferred to next day. Then I started using a simple A5 size notebook. As heading, I used to out today's date in dd/mm then a empty square box underneath date, & then the phrase To Do. On page I would do a phrase YYYY-MM-DD DDDD & extend tail of lowercase Y to underline the whole phrase. Then simple blank square box, & the task. When that task is done, I would tick that box, & would write DD/MM on right side of line. When whole page is done, I would check that heading big box, & write DD/MM underneath the box. Soon in few months I came across Bullet Journal concept, & I adapted index page, & Specific Task pages (like Financial To Do, Programming To Do, Travel, In Six Months, Big To Do). It is fun.