If you're having trouble discovering which lounge you can go to in a particular airport, the loungebuddy app could be useful to you. You tell them which credit cards you, and it'll show you the lounges which you can access, how much they'll cost, and the amenities they'll have.

I have questions about the $200 annual travel credit with the Platinum card. So I know I get it each calendar year, but does the trip have to be within that calendar year (e.g. can I book the hotel in 2014, but stay at the hotel in 2015, without using my 2015 travel credit?). Also, does the travel credit have to cover a single transaction (e.g. can I book a $150 hotel room, then later a $50 car rental?)