If you are willing to connect your Facebook, Instagram, and Twitter accounts to Marriott by December 7th, you'll get 500 points each AND INSTANTLY. If you are willing to get follow Marriott on Twitter and Instagram, that will earn you an additional 50 Marriott points each. That's 1600 in total! Then, when you link your Marriott account to your SPG account and transfer any number of points, it will extend the validity of your SPG account (so your points don't expire if they were about to).
Click here to get the very easy process started.