Why run to the store, just print out what you'll need! For artwork or home decor, room tiles or designing bead loom work. Here's several sites where you can print your own grid paper. Each is different; one is a PDF file, pick the one you like best.
Just found the greatest site with lots of great subareas, one of which has to do with making your own household cleaning products. Also a section on making your own beauty products at home:
