Are there any websites that can tell me what I can and can't do, as far as working for myself with no license?

I want to supplement my income with some side work and was wondering what I could "legally" do without crossing to far.

I am pretty competent with the skills I have so far and am more than qualified to do things like hang ceiling fans, wire bonus rooms, wire hot tubs, run outside specialty lighting, etc.

I would not want to get into wiring a new home or anything of the sorts. I just want to make some extra cash, but alas I have no idea where to look or who to contact.

Any help will be greatly appreciated.

Philip

"If common sense was common, everyone would have it"-not sure, someone here