Protoss guide

          Protoss vs Terran - In this matchup you can 1gate -> gas -> cybernetics core -> another gateway -> if he 2gates then you can lay down a forge / 1 cannon positioned well by your ramp but not all the way on the ledge seeing as how it can get sniped easily by marauders that way. but you should be able to tech to robo and pump marauder in time.  

          If not then yes a cannon will help stop a rush as well as a sentry with your zealots , the warpgate research needs to be started as soon as cybernetics core is finished and chrono boost from nexus used on cyber core in order to make the warpgate research finish faster.  

          Once robotics facility is complete you pump 2-3 immortals continues then into colossus as fast as possible, once your colossus is out u can get 1 observer if you dont know what he is doing and use that scout and continue colossus after the observer while you can most likely safely expand or if you have been fending off his attacks , if you won you should be able to easily overpower him once your expansion kicks in.  and at that time you can have about 5-6 warpgates and 2 robotics facilitys pumping at first nonstop colossus then transition into nonstop immortal with your warpgates, and your macro will be very high. then of course into mothership and expand more.  

                If terran goes banshee go stalker .  dont forget to upgrade zealot leg speed because zealots will be more effective vs terran infantry with this upgrade.  Also dont forget upgrades from forge after your expansion is finished. Colossus is super effective vs most ground units.  

               When you get colossus dont forget to get its range upgrade always.  This is basic guide to safer pvt style in my opinion.  gl hf gg