Use your computer to set up a grocery list form. Our family created a form made of two columns, with several headings in each column that give a brief description of the items on each aisle. Grocery departments will usually have between 12 to 15 aisles plus the produce and bakery sections so you'll probably have 7 or 8 headings in each column with enough space underneath the heading to write the items needed. This worked the best for us as it allowed us to quickly work our way through the store without a lot of backtracking. We keep this form posted on the frig so we can quickly write down items as we think of them.