Building robotics is difficult. This page will contain resources to help you learn how to build and program your robots.
Robot Reveals. Some teams post videos of their robots. I think this is done partly out of a sense of accomplishment that they built something worth sharing and partly as a way of letting other teams know what is possible. These are not ranked in any particular order.
Vex Products. Almost everything we use must come VEX robotics. Here's their main product page.
Tutorials.