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It depends on what you want to do. If you have a clear idea of what you want to do or find out, but do not know where to derive the underlying data from, you can add those questions here and someone will likely guide you as to how to achieve it.
If, on the other hand, you are unsure at this stage, you could follow a bottom-up approach, study what's available, and see how you can use that to display something new. @tranthidung has started working on a topic to facilitate this approach:
(Un)official pages that store forum data , which expands futher on what he added to this thread.
