I've read that flying open-jaw is usually a good idea. How do I do it? I've been looking up airline tickets online but they only have the option of round-trip or one-way.
When I you use a site like expedia or one of the airlines web sites, you are given the option of one-way, round trip, or multiple destinations. "Multiple destinations" is the same thing as open-jaw. I find that orbitz.com works best with these type of flights.
sometimes the mult-city option is hidden under "Advance search" or "addition seach" button. It will be there somewhere. We saved $200 this summer by flying into Rome and home from Zurich over a RT to Rome.