I’ve been using Summit lately and like it so far; the dev is responsive and there are quite a few customization options.

I previously used Sync (now abandoned), Jerboa, and Connect as well. Jerboa didn’t seem quite so customizable, but it was a nice and simple UI.

I’m a checklist person, and the free version of ClickUp gives me what I’m after: task status, due date, priority, etc. I’ve also used Notion and Trello in the past, and they were both fine for their respective purposes (knowledge management and kanban boards, respectively).

As for email, anything that comes in gets left unread in my inbox until it’s dealt with, whether that’s a reply, an action, or whatever. Once it’s dealt with, it gets filed into a folder based on topic (Outlook search isn’t super helpful, so the topic breakdown helps).