Well there are 4 areas you might concentrate on:
- Crushing the threat of the SA and winning the confidence and "trust" of the army.
- The use of terror, repression and violence on opposition groups and on society in general in their acceptance of Nazism.
- The Fuhrer Myth and the clever use by Goebbels of propaganda to portray not only Hitler, but Nazism, as a saviour of Germany.
- Changes to society- arts, architecture, the role of women/youth/religion, the economy, political system, military and social outlooks etc.
By enforcing all these changes, the Nazis maintained power through the use of violence, and more importantly (in hindsight), the disillusionment of the German population who thought that Nazism would be a new and better chapter in their history in comparison to the "Weimar Republic" debacle.