I use a physical notepad, OneNote, and Quire. The notepad is a shirt pocket sized 3"x4" piece of cedar shingle with a standard size (letter or A4 about) piece

I use a physical notepad, OneNote, and Quire. The notepad is a shirt pocket sized 3"x4" piece of cedar shingle with a standard size (letter or A4 about) piece of paper folded 3 times to make 8 sub-pages per side, held on with a mini binder clip. This is mostly for shopping lists, but also for ideas I want to capture right away. When one sub-page fills up, I refold the sheet to get another blank page. I also put sticky notes on it. I use OneNote synced on my phone, home, and work PCs to capture longer format notes, brain-dumps, links to web sites, images, etc. Quire is a really nice hierarchical todo list that I use to break ideas down into steps and keep track of progress on projects. It also syncs between my devices. https://quire.io https://quire.io , https://quire.io/tutorial https://quire.io/tutorial