It can be hard to see things cut, but you know they need to cut things to make the movie short enough. The ones that get me are when they cut stuff that seems important at the same time as they add pointless stuff - the best example I know is the dragon-chasing-Harry scene in Harry Potter and the Goblet of Fire; it doesn't happen in the book, adds nothing to the story, and takes an awful lot of time that could be used on something that did happen in the book.