This process usually gives the best results. Invariably the moment of realisation must have been preceded by a period of preparation. In origami terms, working with a few selected techniques gives familiarity and can trigger a spontaneous creative surge. Models suggested this way need only a little extra work to complete. There is no single way to create.
Creation is an imprecise art.
Usually several of the processes outlined above are employed together in the creation of a single model. The important thing is to keep trying, it does get easier with practise. Other Creative Aides Inspiration can be triggered in many ways. Adopting a favourite technique perhaps and developing a new model using that technique. Taking a new tack i.e. tackling a subject nobody has yet done or tackling an old subject from a fresh viewpoint.