If you are using ctags with Vim, you can provide a tag name when opening Vim. This signals to Vim that it should open to the file and location of the tag’s definition. For instance, if you have a Rails project going and you provide Vim with the UsersController tag name, it will open the app/controllers/users_controller.rb. Just use the -t flag like so:

$ vim -t UsersController

See man vim for more details.