If I'm with the nephews, we usually knock out the fantasyland rides first (with the exception of IaSW). We'll check the board and see how the lines are doing at that point and then are flexible the rest of the day.
If the nephews aren't there, we hit the mountains first, ride the people guzzlers (PotC, HM, IaS, etc) during peak hours and then remain flexible the rest of the day according to board times and parades.
It's great to have a plan, but remaining flexible is the key to enjoying your day. Have a great time :wave: