USGS is a great site for a multitude of things. You can find maps for just about anything on Earth as well other planets. You can also search their library database for research projects. There is also links for currents jobs among other links that will you will find useful.AAG is another great site because it is the official Association of American Geographers website. Here you can find plenty of material to read on anything Geography. There are journals, books, and news articles. You can also search for jobs/careers on this site to.
Earth Week is my personal favorite out of these three websites. I like it because it has plenty on articles that deal with events occuring around the world. It is more involved with climate and environmental patterns. It is a website that is a little more fun, so you want to clink links and see what is happening.