Get up early and arrive at the parks before opening.
Eat a snack for breakfast and then have an early lunch if you're eating in the parks say around 11.30 - 12.00.
Or if you have a big breakfast consider taking a late lunch say at about 3.30 and then you won'e need to have a big dinner.
If you see a ride with no or little line and it's one that you have on your list don't walk past it ride it - you may come back later to find it 30 mins wait.
That should get you going
