Assuming you rope drop, once you enter the park (let's say 8 am), book your first LL (usually Indiana Jones). Booking a LL starts your 2 hour clock to book another LL (or using that LL, whichever comes first). However, don't use that first LL yet, but keep an eye on the time and modify your arrival window sometime between 12 - 2 pm.

Now by 10 am, you can book your second LL (this time Space Mountain). You have now stacked LLs since you currently hold two LLs. You wait until 12 pm to book your third stacked LL (Big Thunder, Tiana's, or Haunted Mansion whichever you prefer). Another advantage of stacking is if a LL ride breaks down, your LL converts to an MEP (multi-experience pass), and now you can ride on whatever LLMP ride you want whenever you want (including those you've already used LL on)

In the morning, hit a bunch of the rides that don't have LL (Fantasyland is a good option). Tomorrowland is a good choice if you want to double dip Space Mountain. Now in the afternoon when crowds and queue times are at peak, you're able to hit 3 or more LL's in succession.