Pretty much anything? I just think about it and it happens. When I was little I didn't realize I was doing it, and it created all sorts of problems - extinct species coming back, literally no crime within 50 kilometers of my home town, that sort of thing. These days I make a point not to will anything into existence, at least not frequently. There are some other aspects I can't control or turn off, so I make a point not to abuse the things that I can control.
And transportation isn't a problem; I just will myself around and I'm there. I could do that to other people, too, so I guess I can help with other people's transport. But - I do love cars, so you'll have to tell me all about yours.