hardly build ships really. I do the large fleets of quinqueremes once i get the tech but i've never pursued naval dominance, I normally keep a few ships in most cities ports though, their used for ferrying short distances with the occasional fleet of quinqueremes to guard armies on the move or maybe attack a few other civs smaller fleets. For the most part though i avoid naval combat just making sure i at least have some options in that area though.
Anyone actually controlled the seas yet? was it worth it?