categories of approaches to consider in your ideation:
- interaction types
- typeface choices
- time (simultaneous vs sequence vs other)
- layout / composition / type as image / formal explorations (strategies for type usage vs typeface choice)
when / if you get tired of simply thinking on a range of concepts, shift gears and simply make something, anything. in fact, some random making may generate some very interesting ideas. try it as a brainstorming technique. remember the operative word up there is "rapid" – don't spend a year making one little thing.