Why is the day the standard unit of time for so many workshops, trainings and conferences. I think it's worth questioning.
I often find on training that you can have a really engaging morning, but the afternoon turns out to be exhausting. We got on a roll but then pushed too far. I quite like doing smaller, half-day chunks with space between for reflection. Maybe even shorter chunks.
At the other end, events are often transformed by being overnight. Everyone immediately worries about the costs of accommodation - but I feel there are huge rewards for having a group recreate together, sleep reflect and re-examine stuff in the morning.
Bonus link: Roland's sparky post about boring conferences.