Disney pros definitely know which attractions need Fastpasses and which ones do not. For instance, do not get Fastpasses for things like Stitch’s Great Escape, Captain EO, MuppetVision, or shows that do not have a wait anyway. (Remember the wait for shows is really just the time when the show starts.) Unless your Fastpass gets you reserved seating for a show, save it for an attraction that you know would have a long wait time.
2. What attractions to get Fastpasses for