10 Tips on how to be an awesome product manager. 4: Review your product documentation

What are the internal sources that you can get information from? First of all, find existing product documentation – reports, technical documentation, sales documents, manuals for customers, etc. After that, find the current versions – this gives you an interesting view on how the product evolved over the years. Regarding external sources, you can go online and read blogs, newsgroups, forums or product reviews. Then again, talk to your customers. Always keep in mind to never stop researching and learning. More on this topic here http://www.slideshare.net/brainmates/10-tips-on-how-to-be-an-awesome-product-manager