look for spots to open pots in late position, to steal/re-steal, to squeeze, or to 3bet in position.
sometimes, when you're card dead, it's better to find spots to play than actual hands. plus, no one else knows you're card dead unless you're just folding constantly. so mix it up with some aggression, play post flop accordingly, and no one has to know you decided to squeeze with j2s on the button unless it gets to showdown.