Literary devices in Hamlet?

I'm looking for specific examples of literary devices found in the play Hamlet by Shakespear. Things like metaphors, similies, alliteration, imagery, symbols, motifs, irony, personification, paradox etc. But I only need examples from Act 2. Plus it would help if you could explain how the example is significant to the understanding of the play...i mean just a short explaination of what purpose it serves =) thanks for the help in advance....;)