These are just a few of the things I love to use when I am quilting. I will add to this list periodically with brief reviews.
This is the Sunday Best Quiltworks HST template, they come in several sizes and if you need to make a lot of HST units, this is a grand solution. I own several sizes and use them frequently. They have a video on their website that shows you how very easy this is to use. All of your units will have straight rather than bias edges and will not require additional trimming to get them to the proper size. This is just one option for creating HST units...there are several.
Blue Line Eraser! There is nothing worse than marking your quilt thinking that you will be able to remove the marks, only to find out they are still there, or that it's taking you forever to remove them. That is no longer a problem. Blue Line Eraser to the rescue! This particular kit has everything you need to mark your quilt and then quickly and permanently remove those marks without damaging your quilt. If you used a blue water soluble marker and your marks did not come out or even worse, you ironed them in...this is your salvation! Give it a try, you will be so happy you did!