Hi guys

I travel to India every other year and I have 17,000 miles on Continental and American Airlines. Now which one should I fly more on to accumulate points so I can get free ticket faster? Do they have any offers to increase points and what should I do to accumulate the points quicker?

Also, last year Delta matched miles with 100% bonus miles when purchased. Is Delta or any other airline doing it this year so I can go to India with a better seat or free seat?

Thanks in Advance.