Also trips =!= a set. Trips = 2 on the board, 1 in the hand, A set = 1 on the board, 2 in the hand.
A set usually has more value, because it's disguised.
Also, never always do anything. There's no right or wrong way to play any specific situation - it's best to talk in terms of "mostly", or "rarely". You want to mix it up to balance your play.
But not too much...then you become a spewlord like me who's obsessed with 4bet bluffing w/ A2. Havent been caught yet though