Internet and World Wide Web being richest and widest knowledge source ever existed. Today, through search engines like Yahoo, Google, MSN, Altavista and several others any information is just a mouse click away in real sense. Hence, you can always use available resources in the form of tutorials, open sources, discussion forums. You will also find official site and resource centre f all technology providers. Moreover, u will have different trouble shooting tips for almost every problem. In case you don't find one u can always ask your fellow professionals and expert related to topic through discussion forms.
Its hard to make endless and exhaustive list of available URLs. But a few common and vastly used are mentioned below:
