VBA
Microsoft provides an excellent online resources in-depth on VBA and in a wide range of subjects. However, I sometimes found myself spend unnecessary time just want to get for very simple question.
Unlike Microsoft who wants to capture all the audiences with relatively generic resources, this site focuses on providing your answer on specific inquiry you have and simplifying your learning strategy.
This site does not explain “what VBA is?”, but this gives you straightforward answer and the quickest reference to address your questions about “how to use VBA”.
SharePoint
This site does not only gives you full understanding of SharePoint, but also provide you the understanding how to resolve issues. Numerous changes on Server configuration has been done. As the result, I have recreated many different type of issues. I have documented the issues and resolution to the problems.