I have always loved this quote too - the thing about planning is not that you can actually workout what to do, but you cut down on the novelty you have to deal

I have always loved this quote too - the thing about planning is not that you can actually workout what to do, but you cut down on the novelty you have to deal with when faced with a new situation. Your brain can only handle so much new information at once and planning lets you handle new problems better as you just have less new to handle at once.