Mom's Post-It Dashboard and Dad High Up.

My parents are hard working self-employed people, well into their 70's,  who still love their work, and exemplify the attitude that they would much rather keep working than ever retire.  My Mom suffered a pretty severe stroke in 2016, but it's a year out, and she is back at work, doing all the book work and billing - doing it even though her handwriting isn't what it used to be.

She uses a manual Olivetti typewriter which she brings with her in the big red work van (has several backups) and spiral bound notebooks. Her dashboard post-it system may look a bit haphazard, but - for her - it works.  Their website.