All of those fights will be on the main Pay Per View card starting at 9 p.m. ET. I highly recommend ordering the HD version on SBN sponsor Comcast if you're in a Comcast region. The Yahoo PPV stream is an alternative if you don't have a cable provider or are outside the USA. UFC.tv features multiple camera angles, multiple audio feeds, real-time DVR controls and a whole bunch of other stuff I haven't had the chance to try out. The full fight card is also available via via the UStream platform (at a cost of $44.99) to view the entire fight card top to bottom.
Online
Two fights, Demian Maia vs. Jorge Santiago and Anthony Pettis vs. Jeremy Stephens, will air on Spike TV at 8p.m. ET. The rest of the undercard will air on Facebook starting at 5:58p.m. ET. Facebook users can go to the UFC's Facebook page to see the fights for free. If you are a Facebook user, all you have to do is "Like" the UFC page and you can watch the preliminary card for free.
If you want to go out to a bar to see the main pay per view card (and probably the Spike TV fights as well) the UFC has a searchable database of bars showing UFC 135 sorted by location at bars.ufc.com. Just enter your zip code to find the bars closest to you. The results will show the bar's phone number so you can call ahead to find out information on cover prices and confirm that they're showing the card.
The UFC is also making the card available to for iPhone or iPad users who buy the UFC app from the iTunes app store. The app is $0.99 while the pay-per-view remains $44.99.
Main Card (Airing on Pay-Per-View at 9 p.m. ET):
http://mma.sbnation.com/mma/fight/770/ufc-135-quinton-jackson-vs-jon-jonesLightweight Championship: Frankie Edgar vs. Gray Maynard
Featherweight Championship: Jose Aldo vs. Kenny Florian
Middleweight: Chael Sonnen vs. Brian Stann
Lightweight: Joe Lauzon vs. Melvin Guillard
Featherweight: Leonard Garcia vs. Nam Phan
http://www.sbnation.com/mma/fight/682/ufc-133-mike-pyle-vs-rory-macdonald
Preliminary Bouts (Airing on Spike TV at 8 p.m. ET):
Middleweight: Demian Maia vs. Jorge Santiago
Lightweight: Anthony Pettis vs. Jeremy Stephens
http://mma.sbnation.com/mma/fight/844/ufc-135-anthony-ferguson-vs-aaron-riley
Preliminary Bouts (Airing on Facebook @ 6:00 p.m. ET):
Heavyweight: Joey Beltran vs. Stipe Miocic
Featherweight: Zhang Tie Quan vs. Darren Elkins
Middleweight: Aaron Simpson vs. Eric Schafer
Middleweight: Steve Cantwell vs. Mike Massenzio
SBN coverage of UFC 136: Edgar vs. Maynard III