Take your project as you currently conceive it (however foggy that may be).

Step one: Identify and describe three possible units of analysis. For each, muse a bit about what makes it intriguing or intimidating or boring or provocative.

Step two: For one of these three (the one that most grabs you), try to identify at least two of each of these types of variables.

Internal states
External states
Reported behavior
Observed behavior
Artifacts
Environment

Step three: Identify at least three different research questions from three different cells corresponding to variables you were able to identify in the previous step.

DON'T stop until you have a really good idea!