Okay, let's see how those on the board really stack up in terms of secrets and strategies for earning points and miles. Everyone post their best tip or tips to earn extra mileage. We're looking for advanced mileage strategy here--not something as simple as "charge all expenses in the hotel to your room, so you then maximize the hotel's program points on check out."
I'll start. We REALLY maximize the total dollars we can charge to our affinity credit card. My mother in law lives in town near us, and anytime she has a particularly big expenditure, we of course volunteer to charge her expense on our NationsBank Dividend Miles Platinum card (1.2 miles per dollar). She then makes out the check to us, instead of to the store or merchant. For example, last year she had to replace her Central Heat/AC system. $4000 dollars, so 4800 miles right to our US Air FF account.
Okay, I've started. Let's hear the strategies.