I always recommend voting for the Wikimedia Commons Picture of the Year and perusing past winners. I see it as an all-too-rare instance of structured peer-produced cultural relevance, even if nearly all candidates are still images. The first round is difficult to vote in. There are so many stunning and useful images. Fortunately in the first round you can vote for as many as you wish, so no need to be particularly careful. This year’s first round concludes April 10. Go vote. If you haven’t edited a Wikimedia site, it’s not hard to do so a bit so as to qualify to vote next year.
There should be a contest to select the best promotional material for any free work. This could usefully encourage such material, further promote the promoted works, and filter out non-promoted works, all in the interest of creating free cultural relevance and working toward real competition with the marketing and distribution engines of proprietary industry.