Via One Mile at a Time, you can earn up to 1,000 rapid reward points by signing up as a new member and opting to receive both communications. You must keep subscribed for 3 months and remember that points don’t expire if you have activity every 24 months.
To earn another 350 points, you can sign up for e-miles before Oct 31, 2012. You will get 100 bonus miles plus 250 miles for activating your account within 90 days. For e-miles, you have to earn at least 500 miles through surveys in order to transfer these miles to your Rapid Rewards account. If you already have an account, no worries, just use a different email to sign up. For links to various other participating programs click here.
As many of you know, SWA has merged with Airtran. Here is a great post from the Points Guy on how to transfer miles between the programs.
Here is also a link which allows you to check in to your flight automatically to get a better boarding group.
For a great post about the SWA companion pass, check out this one by Extra Pack of Peanuts.