I am travelling LHR-JFK tomorrow evening on an economy fare. As an AAdvantage Platinum, are there any advantages that I should look out for? The next day I am travelling JFK-SFO and then back next week SFO-LHR on a codeshare BA flight. Again, any tips? I think I get a second checked bag free and lounge access, but am new to Platinum, or any elite status for that matter, so any experienced advice would be welcomed!