Hi Threetirteen,
I think you can probably do better than Clandestino's advice, but I'm not the person to give you specific advice about how to get into a Command position. (I work in IT and fly for recreation).
But you're sat next to Pilots who have made it, and probably will be commenting on your performance to the Chief Pilot, so why not ask them?
Find the young captains and ask how they progressed quickly. Ask the older captains what they are looking for when assessing your performance. Ask them what are the 'little' things are that will get you noticed as being 'ready' for promotion.
Patience is probably a virtue; people wanting promoting before they are ready are a turn off. Find out how to spot when you are ready, and be prepared to stick with the airline even after you know you are promotable.The opportunities may not exist. Stay and ensure that your employer knows you are staying through loyalty and commitement to them, and I'm sure that the left hand seat will be yours.
Best wishes in your career.
tp