[Error: unknown template qotd]It depends. Some things really do need do be planned while others work fine, or even better, when they're a spur of the moment thing. If you've got a big group of people doing something, it's usually a good idea to plan it. If it's just a couple of people, it's easier to just go and do something. Also, if you're travelling a long way, it's better to plan in advance. Plus a lot of things cost less when booked in avdance.