I use Spark to have all my mails in 1 place. I could do it with Apple Mail as well but for some reason I like Spark more. It also contains a build in calendar.

I use Spark to have all my mails in 1 place. I could do it with Apple Mail as well but for some reason I like Spark more. It also contains a build in calendar. And thanks to it's syncing feature whenever I'm on a new device I just need to log in with 1 email and everything is synced. As for my todo's I use Things. I tried to make as much use of Area's and Projects as I can to split up my todo list in a logical sense. For notes I use the Bear Notes app. Thanks to it's # tag style structure I can easily flesh out my own dir structure on it. Last but not least: paper + pen. Nothing beats that when I'm working on a feature and I need to keep track of todo's that still need done. All of these todo's are done by the end of the feature off course. Nothing long term on paper.