The Queen is usually reckoned equal, in average situations, to two Rooks and a Pawn, but towards the end of a game she is hardly so valuable as two Rooks.
A Rook is of the value of five Pawns and a fraction, and may be exchanged for a minor Piece and two Pawns. Two Rooks may be exchanged for three minor Pieces.
Unlike most great talkers, the rooks are good workers, too.
Knights are cavalry, bishops are archers, rooks are cannons and queens are wizards.
The retreat of a minor piece to the back rank, where it cuts the lines of communication between the rooks, is permissable only in exceptional cases.
As to people saying a few idle words about us, we must not mind that, any more than the old church steeple minds the rooks cawing about it.
Over the land freckled with snow half-thawed
The speculating rooks at their nests cawed
And saw from elm tops, delicate as flower of grass,
What we below could not see, Winter pass.
If once a man delays castling and his king remains in the center, files will open up against him, bishops sweep the board, rooks will dominate the seventh rank, and pawns turn into queens.
I have also heard that GM Oscar Panno said that -whenever you have to make a rook move and both rooks are available for said move- you should evaluate which rook to move and, once you have made up your mind... MOVE THE OTHER ONE!!!
If your opponent has an exposed king it is frequently worth sacrificing a pawn to be able to bring your rooks into the game, especially if your opponent's rooks are languishing in the corner. Kasparov has made a career out of such sacrifices.