Hmm... well, over the years I would say I have offered advice for many different things. Currently, I offer my services as a consultant for a funeral parlour from my world, though I have offered advice to numerous people on all manner of topics, from business, to contracts, to historical references, to proper brewing techniques for wines. I just happen to have a rather broad smattering of trivial knowledge.

[You learn a lot when you live as long as he has.]

Though my knowledge may not be quite aligned with your expectation, I will do the best I can to offer what insights I can.