I also suggest getting to Epcot at opening, and going straight to Soarin' and wait in standby......the wait's usually 20 min or less. Then get fastpasses for TT and head over to Mission Space. I personally find the wait for MS a lot more bearable than TT....usually 30 min or less in the morning. And if you'd like to ride Soarin' again, which you probably will, grab fastpasses for that once your time is up (you know, the time they give you on your fp to tell you when you can get another one). We've done this several times and it has worked great!