Meditation: This involves focusing your attention on your breathing, a mantra, or a positive affirmation. Meditation can help reduce stress, improve mood, and enhance brain function.

Visualization: This involves forming a mental image to represent information. Visualization can help improve memory, creativity, and problem-solving skills.

Playing games: Playing card games or board games can be a fun way to socialize or pass the time. Playing games can also help stimulate your brain, improve your concentration, and boost your memory.

Playing memory card games: These are games that require you to match pairs of cards with the same image or word. Memory card games can help improve your short-term and long-term memory.

Practicing crossword puzzles: These are puzzles that require you to fill in the blanks with words that fit the clues. Crossword puzzles can help expand your vocabulary, test your knowledge, and challenge your brain.

Playing sudoku: This is a puzzle that requires you to fill in a grid with numbers from 1 to 9 without repeating any number in a row, column, or subgrid. Sudoku can help improve your logic, reasoning, and arithmetic skills.

Playing chess: This is a game that requires you to move pieces on a board to capture the opponent’s king. Chess can help improve your strategic thinking, decision making, and memory.