What is commonly used in many production houses is: Edit>Convert to profile>”Working CMYK – U.S. Web Coated (SWOP) v2. You have other working profiles but you must experiment as to what gives you the best color rendition where you live around the world but this all assumes you have calibrated your system. So make an initial conversion and see how it looks on your screen then see how it looks in print. In my experience, if all colors look good in the CMYK profile then most printers will be able to use it.