Apple Users

I'm in the same situation as REP. I want to be able to watch professional tennis & other stuff which isn't even played live on cable channels, usually. I've been so disgusted by the meager coverage of the Olympics on the TV; back in the "olden days" when ABC had the olympics, the games would be run most of the day, as well as at night, and you could choose what you wanted to watch. Now, there are just snippets of this and that, and nothing is really scheduled as a whole event. I'm looking forward to learning how to watch what you want all the time through online streaming, and do away with cable. Any advice people have please share.