How to manage high cortisol levels and stress?

Some repeats:
 

• Maximize sleep (don't burn precious minutes/hours scrolling your phone, etc.)
• Fit in exercise (even if this means joining a gym open until midnight, etc.)
• Have something to look forward to each week (a dinner, a fitness class, a friend to see)
• Set mental boundaries/objectives that dictate when you can be "done" that day (i.e., "once I've finished X and Y today, my day has been a success and I can rest easy. While Z is on my mind, I've compartmentalized it that it isn't a task for today and instead part of tomorrow's to-do list."
• Find some small ways to make each work day fun (a coffee run squad that you look forward to walking with, an ongoing (appropriate) Teams thread with colleague banter, a lunch routine or rotation ("on Thursdays we go to XYZ as a tradition"), a colleague who goes head-to-head in NYT games with you, etc.)
• Make time for friends/family outside your industry who can help ground you and focused on the bigger picture of life