I have always had brain fizzles when knowing which side to press the seams. So...in a piece like yours, I would press all of my seams to the left on the odd number rows and press the even number rows to the right. That way I know that the seams will always be opposing. Now when it comes to doing blocks with several seams, I am always "fizzled." So If I come to a seam that has been pressed to the wrong side, I just finger press it the way it should go to stitch and then press well with the iron later.