Possible actions in a player’s turn are:

Play 1 card from your hand.

Move 1 character or army in reserve to an active path or battleground.

Cycle 1 card from your hand.

Winnow by eliminating 2 cards from your hand to draw 1 card.

Use an Action to resolve the text of a card in play indicating you may “use an action to...”.

Use a Ring token to draw cards.