10 easy ways to build mental toughness that you can do today
1. Skip a meal
2. Work with no heat on during a colder season
3. Give yourself a tight deadline
If it takes you an afternoon to write a letter, write it in one hour.
4. Wake up early
5. Don't use your screens/devices for a whole day
6. Walk a long distance that you normally drive to or take public transit
Within walking distance, of course.
7. Do something where there's a good chance you'll get rejected
8. Don't stop doing something when you feel tired and push through till you're finished
9. Force yourself to read a highly educational but complex piece of writing on a subject that's interesting to you
Like a textbook.