I recently received some fun new notions to help with sewing/quilting, and it's funny how you don't think you need notions until you actually use them, and then they become 'must-haves'. The On the Dot Markers are used to align your ruler. I have tried doing this many times with tape or sticky notes, and haven't made it work, but these work for me. I think it's the hole in the middle.
(I hate that my rotary cutter is not closed in this pic...)
I am perfectly pleased with them, and they are reusable too. I had one small problem with one dot moving/sliding around, but I wiped off my ruler and cleaned the dot, and it has stuck perfectly ever since.
The 'Dots' are coming in really handy with trimming my economy blocks. I don't have to think about where to place the ruler!
find them here.