Queen & Rook Middlegames Are there any general principles to playing middlegames with all of the minor pieces exchanged?

I often find myself in middlegames with two rooks and a queen on either side, with no clear idea of how to proceed. Are there any guidelines for how to proceed in such games? In general, I find that the initiative is much more important than being up a pawn or two.

A good example of such a position that I have reached is the following game (white to play):
King safety is a big issue for white in your position.  White would be much better if the f3 pawn were at g2 instead.

I would probably play kg2 and if the black queen checks along the g-file try to hide the king on e2 via f1.

As for general principles, I would say king safety is the first priority.  Then probably obtaining advanced supported passed pawns and active pieces are next most important quality.  Material balance is always important, but the key to winning these endgames usually comes down to queening a pawn and the more advanced one is the more dangerous one.