3D Warehouse

Google's 3D Warehouse is the place where anyone can upload a 3D model for others to download. It's like YouTube for 3D assets. It's worth familiarizing yourself with the 3D Warehouse right at the start because you'll find it an integral part of your game-level creation process. After all, you don't need to make everything yourself, especially if there are bags of good examples already out there. Next, looking at what other people have done well (and badly) helps you to hone your skills. Finally, you need to get an idea of what's popular and what's not if you are to sell your assets, and 3D Warehouse is a good place to do that research because you can see a lot of usage statistics.