Learning is a constant part of decision science and, for those looking to advance your analysis skills, it never hurts to have some extra resources. Microsoft (R) Director of Sales Excellence, Eric Ligman, is offering TONS of free eBooks on their products.
Microsoft (R) makes some foundational software that many of us used to do our first analysis. They have taken the gloves off to fight in the data mining and visualization space by offering Power Pivot(R) and Power BI (R) for free. If you’ve been using traditional tools and want to expand using a familiar ecosystem, they may have some free resources to help! Some other potentially helpful topics include agile project management, SQL, and Azure (R).