If you want to act later in the round, you have to await someone that is later. Could be an NPC, a PC or a monster.With risk of simply mudding the waters further:
In order to make a parry or dodge possible later in the round, is it enough to say "I do nothing" at your turn, or do you have to swap initiative cards wth someone further down in the queue?
If it is the former, do you flip your card or not when you say "I do nothing"?
This was my reading of it but now understand this to be incorrect (thanks Fenhorn). You have to wait to parry/dodge later in round which means swapping initiative cards with a character/NPC/monster. Then when your turn comes up and you use your action to parry/dodge you then flip your card. Of course by then you may decide to use your action for something else if there is no need to react.:
In order to make a parry or dodge possible later in the round, is it enough to say "I do nothing" at your turn,