One of the best things about The Elder Scrolls V: Skyrim is the ammount of flexability there is in how to carry out a quest. And one of the best quest lines in the game is for the Dark Brotherhood. You know, the evil scumbags that are pretty much hire blades within the game. My favorite mission actually happens pretty early on in the quest line. The mission requires you to slay the emporer's niece, Vittoria Vicci, on her wedding day.
Let YouTuber pms00 lay out the many different ways of completing the deed. A lot of these, I didn't even realize were possible. But make sure you take out Vittoria during her speech, then you'll get your bonus! Completion of the quest will net you 10G on Xbox 360, or a bronze trophy on PlayStation 3.