Film making and firm editing both are nothing less than an art. Contrary to painting or music, these primarily involve use of three senses i.e. auditory, sight and speech. Being an art, these need special use of these senses. Furthermore, the film maker and the film editor must always see the film or its shots as if it is being watched by the audience as it is ultimately the audience that will decide the success or failure of the film.
As it is applicable to all other arts like music dancing or painting or any other form of art, practice is what makes it perfect. However, there are some critics who propound that alike other forms of art, this too is inborn and cannot be derived by howsoever means. It is right to some extent but there is also a larger section of thinkers that believes that there should be some inborn talent for this art in a person and the person can become perfect through proper training and practice. Thus, a film maker is neither born nor he is made, it is actually a combination of natural talent and hard work.
Besides proper training in these arts, the best way to find the ins and outs of film making is through studying films critically. Ask yourself a lot of questions regarding the scene/scenes. Question and find out answers to the process used. It gives an insight into this art and enables the person to assess the flow of each of the film production process. In addition, there are schools that specialize in imparting training and their services are really helpful. Moreover, the actual training begins when one sets out in film production. It is here that the person learns a lot and experiments with the knowledge and resources he/she has.