Dottie, I think 2 per week is just right. I like to get a project box out and work on everything I need to do all at once. Then I put it away and work on another quilt's blocks for the month. That includes the Rainbow Scrap Challenge (making two different quilts for this each month), Dear Jen, and another one organized by Aby Dollinger. This routine seems to help me get things done and I definitely don't get bored!
I did finish another four Harriet's blocks and love the way they are turning out. Here's a photo.