If you didn't read the contest announcement earlier in the month, checkout Linux Hardware Enthusiasts: Win Some $100 Amazon Gift Cards. That article covers all of the contest details, but it's quite easy; it basically comes down to running your own Phoronix Test Suite benchmarks, uploading them to OpenBenchmarking.org, and then sharing them with us to enter the contest via Facebook, Twitter, or Google+.
As the latest addition to the contest is on top of the three $100 Amazon.com gift cards there will be five one-year Phoronix Premium subscriptions being given away too!
You're able to submit to the contest daily before it ends on 7 April. With being Amazon.com email gift certificates and Phoronix Premium working world-wide, the contest isn't limited to the US alone. Good luck!