It's a bit short notice, but if you're up for it, the papercraft webshop PaperJig.com is having a papercraft contest to prove that you are the best papercrafter around! ;o)
Entering the contest is as simple as uploading a few good pictures of any origami or papercraft creation you built (you can even use one of mine! ;o) along with your information before coming the deadline; and to give papercrafters more time PaperJog.com is extending the contest with one week, so the deadline is now Friday, August 25th.
The Monday after that, 12 finalists will be chosen on which people can then vote to decide the winner. Depending on how many voters will participate (voting will cost $1) the prizes that you can win will go up.
But that's for later of course, first you need to do your best building a cool papercraft! For more specifics about the contest, visit the PaperJig.com papercraft contest webpage here:
Good luck and have fun!