Sudoku, crossword puzzles, Brain Training, Scrabble, all of these ways to keep your brain exercising and in top form. Here is another one. Try to think about process (how) as well as what you are doing all the time. Every time you do something – a project, proposal, a conversation – consider what you are saying and how you are saying it; who is hearing you and what they are thinking about what you are saying (both implicitly and explicitly). What is the big picture and how does this activity fit into our strategy? What are we talking about and how does this fit into our ground rules for discussions?
Complicated enough to keep your brain in tip top condition!