These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dreyman says "my place is safe" to Paul in the park. Sure, he didn't know it, but Wiesler was the one keeping it safe.
Look carefully at the young man handing Wiesler the earpiece saying "the Wall has fallen." It's the same guy who told the joke in the canteen.
In Dreyman's play, at the very beginning, Christa-Maria's character says, "Why am I not spared these visions?" This could reference any number of things that happen in the film, but considering it cuts to Wiesler immediately after, it could be a reference to his being conflicted between protecting Dreyman and fulfilling his duty to the Stasi.
Tear Jerker: Many moments, especially Christa-Maria's death. Also, the softspoken ending often has people blubbering.
Bookstore cashier: Would you like it [the book] giftwrapped?