How do you import a project from another Premiere Pro file?

Importing a project from another Premiere Pro file is accomplished by going to File > Import and then selecting the desired file. This method allows you to bring in an entire project, including its sequences, clips, and all associated media, into your current working project.

Using the File > Import option provides a straightforward interface that allows you to navigate to the location of the Premiere Pro file you wish to import. It ensures that all the elements of the project are correctly linked, maintaining their respective settings and properties.

While selecting a project from the Media Browser could be a way to access specific assets or sequences, it doesn't fulfill the requirement of importing a complete project file as intended in the question. Dragging a file directly into the timeline is also not a proper method for importing an entire project since it usually implies adding specific clips rather than a whole project structure. Exporting a project as a template is useful for reusing project setups but doesn't aid in importing an existing project. Thus, the selected method is the correct one for this scenario.