career-related website

Hi, really I don't have any favorite website for my study. but for help me reeding something related with my job. I preferly visit www.wikipedia.com. This website provide me some basic information to orientate my hard research for example. but I don't use this website as oficial information neither as a bibliographyc resource.
wikipedia is a online encyclopedia built for a lot of people arround the world that upload some information related with some subjet. then this information is confirmated for a professional team. its very easy learn to use it. and frecuently appears in the ten first search result of google.
I just recommend this websit for a orietation.