Learn a new language
Play a musical instrument
Read challenging books
Solve puzzles
Do crossword puzzles
Do Sudoku
Practice memory games
Learn a new skill
Write by hand
Use your non-dominant hand for simple tasks
Meditate regularly
Exercise aerobically
Get enough sleep
Eat a balanced diet
Socialize with others
Take different routes
Break routines
Teach someone else
Practice mindfulness
Try strategy games
Study a new subject
Do mental math
Memorize poems or quotes
Engage in creative writing
Draw or paint
Build or craft something
Limit multitasking
Stay curious
Reflect and journal
Challenge yourself daily