How to Open a File with a Specific Application?

Say you have a picture, but want to open and edit it within a specific photo editing application, rather than just opening it in Preview.

Instead of opening that application and finding the file through File-Open, that can take forever right? Is it in my downloads folder? Is it on my desktop?... Just take that file and drag it on top of the application's icon in the dock and the file will open with that application.