In 1992 for my final pre-exams deliverable at uni I wrote the entire program text (in Pascal) out on pen and paper overnight, fuelled by cheap lager and Red Bull. Queued at the door waiting for the lab to open in the morning, then typed the lot in and was delighted to discover not only no syntax errors, but no bugs. Ran it, took a few screenshots, printed them and the listing, delivered it to my tutor and went to the pub.
To this day I swear by pen and paper — not for actual code any more, but most specs/designs/flowcharts/pseudocode, and absolutely all meeting and personal notes. I highly value the focus which comes from not being distracted by the quality/features/font/customisation/whatever of some device/app/workflow du jour.