If you're bored you could check out the submissions that are currently Under Judgment:
https://www.newgrounds.com/movies/browse?artist-type=unjudged&interval=all
https://www.newgrounds.com/games/browse?artist-type=unjudged&interval=all
Or browse some fine (and less fine) Art or Audio from unscouted artists:
https://www.newgrounds.com/art/browse?interval=month&sort=date&genre=0&artist-type=undiscovered
https://www.newgrounds.com/audio/browse?interval=month&sort=date&genre=0&artist-type=undiscovered
You could potentially help some real talents get discovered with your ratings.
Gekkotsuki
Why don't you try seeking something for entertaining yourself, like, reviewing posts of the Portal (for example), then? There are plenty of things that you can do for killing that boredom.