Some of the shows have fast passes, so check that out. Also, some shows are limited on what times of day they are performed. Some have the last showing of the day at 3 p.m., while others have the first showing at 12:45 p.m. I think it varies by the time of year, so check out show times before you leave. If it's not on this site, check the official WDW site, or the MGM site by Matt.