The blinds are last to act preflop.

I thought late position = good, but since they act first postflop it's actually bad no?

Late position is good. But not the blinds. There is a difference.

Position is more important after the flop...

Thanks. In the online ressources I started with this wasn't explained so well.

Harrington probably assumes you know this already, or I skipped the relevant chapters.

Position PF usually is forcing you to consider the holdings they/you may have. Usually later you can play weaker hands since you will have better position. This is the Gap Theory in action. Read TPFAP for a fuller description of this. Preflop, Position only gains tactical value when it becomes a steal situation. Otherwise, You usually follow at set pattern of play and hand selection.

Flop and later streets is where you can exploit positional advantages (and disadvantages) in tactical situations. You can't think of position in a purely first to last paradigm. You need to think where the action is going to come from and how you can act/react to that action. If you know you will be either immediatly before or after the probably bettor, you can use this to figure out your best course of action. DO you want to check, letting the LAA to your left bet, have everybody call, then you CR and have LAA 3 bet to then isolate the table? Or do you bet out and hope he raises to isolate? Or if you act behind this guy, you can raise his bet to isolate, or call to bring along overcalls behind you to build the pot.

Thanks again Marm.

So, when I'm in the blinds very early in a tourney, I should probably fold everything but the strongest hands (if there was a raise)?

Well that depends on a lot of things:

Your stack?
His stack?
His position?
His history?
Your History?
Table History?
Blinds?
Which Blind?
etc.....

very early in the tourney, without any info on the other players, stack sizes about equal, lowest blinds

Originally Posted by Marm

Position PF usually is forcing you to consider the holdings they/you may have.

PF = preflop here I assume, or postflop?

PF usually means Pre-flop.