The Single-Tab Hour
One hour a day where the machine is allowed to do only one thing.
Concentration is rarely broken by a notification. It is broken by the half-second glance at something else, which resets your place far more than it feels like it should.
Switching tasks makes you rebuild your place, and rebuilding does not feel like work while you are doing it. Removing the option to switch tends to work better than resisting it in the moment, because you are not sitting next to the thing you are trying not to open.
Choose the one thing before you start
Written down, specific, decided before the hour begins. Deciding inside the hour is your first switch and it sets the tone.
Close everything, not most things
One tab, one document, one window. Anything you can see is available, and anything available gets visited eventually.
Keep a parking sheet
Every stray thought goes on paper and gets no action. That turns an interruption into a two-second note instead of a four-minute detour.
Stop at the hour
Even mid-flow. Stopping while it is still going well is what makes tomorrow's hour easy to start, and starting is the harder problem.
Go deeper
What the paid version adds to this one.
Which setup changes matter and which are procrastination in disguise
How to protect this when you are expected to reply instantly
What to do between blocks, which decides whether the second one works
A full hour filmed unedited, parking sheet and all