"Remind me to call AT&T when I get home"
"Is it going to rain tomorrow?"
"Turn all of my alarms on"
"What are you wearing?"
(while driving) "Read me my new message"
"How do I get to [restuarant]?"
"[name] is my sister" (you can teach her your relationships)
"Call my sister"
Siri is also new to me (coming from iPhone 4), but those are some random things I've done so far. I'd like to know more things I can say/ask (productive, gimmicky, doesn't matter).
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Haha... she actually has quite a few responses to that one. It's rather amusing.