Did you know that you easily can filter your Sharepoint list or library with values in your URL? This means that you can create a “view” without really creating a view. To spice up your GUI you can for instance insert some graphical boxes above your document library view that filters with URL values. Last, but not least, you can use this method to filter the content of all web parts on a page, you are not limited to filter a view in a document library (after all, a view is just a web part on a .aspx page). You can filter on a built-in column, or a column you have created yourself.
Example: