I was tempted to say "Drink beer and eat pizza" but we are usually drinking Coke or Tea.
Firstly, we have a saying "Talk is cheap". Talk all you want. You can do it while you're swinging a sword or while your standing around doing nothing... no actual declaration needed.
For a comprehensive (so far as I can think of) list of what all possible things we'd declare for a round...
Attack
Casting
Move
Equipment positioning (draw weapon, get out shield, potion, scroll, etc).
Perception (searching, alertness, power perception, finding secret doors, etc).
Combat related skills (Adrenals, Power Striking, etc).
Moving Maneuvers (riding, swimming, jumping, etc).
Static Maneuvers (lock picking, disarm trap, etc).