Personally the Whim Hof method has been a game changer for me. The breathing exercises are the fastest way to clear my head, even if you never do the cold expos

Personally the Whim Hof method has been a game changer for me. The breathing exercises are the fastest way to clear my head, even if you never do the cold exposure training he's famous for. I believe he has an app that guides you through his meditations/breathing but there's also plenty of YouTube videos that walk you through it as well.