Try to ride Kilimanjaro Safari first thing in the morning and/or at the end of the day. The animals are most active then. The Expedition Everest ride is the best thrill ride in the park. If you love it as much as I do, after you've gone through the stand-by line, you can also go in as a single rider, but do the regular line first, because there isn't much to see in the single rider line.
If you do both animal walks (one in Africa, one in Asia), you can use Flights of Wonder as a break between them.
My favorite meal in Animal Kingdom is an order of corn dog nuggets from the little stand near Yak and Yeti's with a frozen Coke from the slushie place across from Flights of Wonder. I usually take my meal down to the little eating area next to the slushie place and sit facing the river.
You can also check with a CM or (maybe) Guest Relations to see if there are any animals being treated at Rafiki's Planet Watch/Conservation Station. Those are morning events, too, so I would head out there after doing the first Safari ride.
