The reminders are a combination of the Pomodoro Technique and vibration alerts on my watch or phone. Just enough to remind me to step back at periodic intervals. As far as success stories I can say that it has cut stress down considerably because I keep perspective and avoid tunnel vision.
The exercises I talk about are usually mental imagery techniques, "the view from above" and recollections of the "dichotomy of control".
My journal is hand written since it is not for anyone else. I try to write at least a half page or more per day. To other people it is probably completely illegible.
Resource wise I can suggest this book https://www.amazon.com/s?k=9781549877735&crid=TQ4VA5BUEQI9&s... for general exercises. It was written by a r/stoic redditor and is very plain language and contains lots of easy to understand mental exercises. For a good introduction to Stoicism look more to Sellars Stoicism Book. It is a little academic but a good read.