For all the info you will ever need to watch any NBA regular season game, whether it be on your television or through a streaming device, continue below. This entry is broken down into: TV viewing options and online streaming options, to make it easy.
TV Viewing Options
NBA TV, ABC, TNT, ESPN
National TV Schedule for all NBA regular season games.
As you can tell from that schedule above, all the nationally aired games will be split between NBA TV, ABC, TNT, and ESPN. NBA TV will actually get the most, followed closely by ESPN, and then TNT and ABC pick up the rest of the slack.
(NBA TV is something you likely have to add to your cable package. ESPN is usually included, as too is TNT. And lastly, ABC is local and can be picked up with a digital antenna, or it's usually one of the first channels on your cable channel lineup.)
And any local games will be airing on your local sports channels. Those channels are usually a part of your cable subscription. Or if you're lucky, you can even pick those channels up with a strong digital tuner/antenna (or rabbit ears). Be sure and comb through the channels you do get, and remember the local stations that get the games, and favorite them. Every market is different though. They are usually in the 20s - 30s in basic cable packages.
For those wanting to watch every single NBA game on your TV (or online or by mobile) continue below for the NBA League Pass options and details..
Online Streaming Options
NBA League Pass, ABC Watch Live, Watch TNT, Watch ESPN
NBA League Pass is the best place to watch any NBA regular season game, but it's not the cheapest.
Full access will run you $199.99. Keep in mind that is only a one-time charge though. And it's a little better than it sounds. First off, you can make 5 payments of $44.99, and it also gives you access to all the regular season NBA games (that aren't already nationally airing in your area, important note there).
And their on demand feature makes all games available to watch, just 3 hours after any game airs (even nationally aired games, which is really nice). And for those just looking to follow one particular team, they offer a discounted $119.99 rate.
On top of that, you also get NBA League Pass Audio, so you can listen to all NBA games live. And if you just want the radio option, that is far cheaper as a stand alone service; something I would highly recommend for just a one time fee of $9.99.
ABC Watch Live, Watch TNT and Watch ESPN will be offering all the games that will air live on their channels for free to stream on their mobile/online applications, as they happen of course (no on demand though).
All you need to do is choose one of those links and sign in with your cable sign in info, and you are good to go! Also, if you have an Apple or Android phone paired with a chromecast or other streaming device (or a smart TV) it's a solid bet you can stream all of these channels straight to your TV as well via their mobile/built-in streaming apps. For example, PS4 and Xbox360 both have Watch ESPN.
Hope this helps. Enjoy the NBA regular season!