advise somebody on something
advise somebody about something

Your doctor will advise you on the best approach to take.

And social services will be able to advise on that.

They can advise on possible effects to areas outside your site.

In addition he plans to advise and write on public policy.

And I know he's advising you on some of these issues.

And he was advising the President on issues of national security.

Please could you advise on the best way to do this?

Students are responsible for getting a three person committee to advise them on their project.

She will, however, advise the Bush campaign on strategy and policy.

Your local authority will be able to advise you on these.