I don't park, but I grid using Easy Count Guideline, sold here. It's a thin red nylon "fishing" line. I grid a little at a time, way before I start my next project, using it as a break from cross stitching. So it's not so tedious. It has saved me from making mistakes so many times. When I don't grid, I always find myself frogging--that's ripping stitches out: rip it, rip it, rip it, like a frog. Enjoy! Adele