We plan which parks we will be at on which days, then which ADR's we want based on that schedule. If we want a ressie at a restaurant that is hard to get (ie Le Cellier) we will have a backup in mind. Having said that, we are also pretty flexible on our ADR times. I may want 6 pm, but I'm open to anything between 5 and 7. When I sit down to make our ADRs I have a list ready. First choice, second choice and times. If you can't get the ADR you want, make one for your backup choice, then think about calling back another day. ADRs get cancelled and you may be able to sneak in to your first choice that way !