I was pressing open seams this morning (there's a two hour delay at work, so I have a bit of time) and thinking how much I like the stick I use. A stick you say, for ironing, don't most people use an, well, iron?
I was in a class for learning how to make strips and curves, and a woman in the class had this pressing stick--it was laid under the seam and the seam was pressed open without interfering with other seams.
I went home and promptly bought a 1" dowel and had my hubby cut it in half so I could have my own pressing stick. I press all of my seams open, and before my magic stick I would often have trouble (especially with smaller pieces) of pressing one seam closed while I was pressing the one next to it open. This allows me to press easily and because I'm pressing on a hard surface it presses well.
Oh, here's a picture.