Sunsama

Sunsama is a daily planner built on the philosophy of mindful productivity. It wasn't created to let you cram in as many tasks as possible, but to help you slow down, pick what matters, and plan a day that's physically doable. Among founders and executives it has near cult status and is aimed mainly at people who run a company or team and whose time is their most precious resource.

It works as a daily morning and evening ritual. In the morning you go through your tasks, pull them in from your tools and email, estimate how long they'll take, and schedule them into your calendar. When the day gets overbooked, Sunsama flags it and nudges you to move work to another day. In the evening you do a short recap of what went well and what to carry over to tomorrow.