On this level the pieces come ridiculously fast and I recommend the save state trick. I'm at a bit of a loss for original advice here, but the last for levels are a bit easier to conceptualize and a bit fairer. The later ones make sense. This--look for 1x3's on the bottom and U's and L's other places. Remember where the L's go. The upper left is a good place to start dumping 1- sized pieces.