First of all, you should practice on the paper by drawing diagonal line through the frame in order to look its impact. It will give you a good idea of how to use converging lines to enhance the impact of photographs.
While taking pictures of converging lines, you need to use a professional camera and also make a good sue of different lenses which should be wide angled that usually enhance the overall impact of a picture.
You should keep in mind that converging lines are the focal point of your photograph and you need to keep these lines on such place in your picture that makes these lines more prominent over all other objects of the picture.
You need to keep practising by drawing converging lines on a paper or frame which will help you to stay focused on your focal point. It will assist you to make a proper use of converging lines while having real pictures.
Make sure you keep the balance of converging lines because it is very important in making these lines prominent over all other things in a photograph.
You can also enhance the impact of the photographs that cover converging lines if you add a few objects in your picture. If you are covering the lines of a train track, then take picture when the train is passing through.
You can also show a car, bus or truck on a road if you are using the converging lines of a road that passes through a forest.
The most important thing in using converging lines is the focus of the lens. You need to make a good use of it and make the converging lines prominent in order to bring desired impact in the photograph.