This is how we like to do our 3 Fast Passes at Epcot. (Let's say the park opens at 9)
Our 1st FP is 9-10 at Living With the Land; then 10-11 at Soarin'; then 11-12 at Finding Nemo (We choose these 3 because they are real close to each other and we can check into them quickly without having to waste time running across the park)
We always rope drop, so our plan is to go straight to Test Track to ride it at 9; sometimes we can ride it twice if we use single rider option the 2nd time. (Or we ride Test Track and then Mission Space.) We can usually get 2 rides in by 9:45.
Around 9:45 we head over to Living with the land to get in the FP line by 10. As soon as we get off of it we walk over to Soarin' and use our FP. After Soarin' we are getting pretty close to our 11 am FP for Nemo. We usually grab a snack or drink or something before we head to Nemo.
So by 11am-ish we've been on Test Track twice (or once and Mission Space once), Living with the Land, Soarin', and Nemo. As soon as we check in for Nemo we try to get another Tier 1 ride, if none are available we'll grab Turtle Talk or Character Spot since they are close to where we are.