I've already offered up my five, but I have to add a couple more...
Mandatory carts and mandatory caddies (except when I'm playing as a guest). Generally speaking, there's no reason not to allow a golfer to have the option to carry his/her own bag. I don't use one, but I also think it's ridiculous that push carts are looked down upon here in the USA. If folks in the UK and Australia can use them, why not here? Seems to me that Bandon has the right approach. Offer caddie services to those who want it, but also allow the golfer to carry or push, as he/she chooses.