1) Don't feed them crepes with chocolate-hazel nut spread, whipped cream, powered sugar, and toffee chips for breakfast. It's great and all to have a dessert breakfast for Father's Day, but we set the kids up for a major crash--and crash they did.
2) Don't expect to have happy kids after an hour drive, where they have enough time to get very, very tired, but not enough time to have any productive sleep.
3) Don't try to do outdoor shots when it's 95 degrees and 80% humidity. The kids no likey.