[Editorial note: There's another way to do this. Don't bother to define a separate category for your master list (i.e., Groceries) and your one-trip Shopping List and move things back and forth. Instead, set up a Shopping List category as your huge master list. Then, check the Show Completed Items in your To Do Preferences (tap the Show button to get there), so that all ToDo Items will appear. When you've entered all your items, check each one off. You will be keeping all the items checked by default.

When it's time to shop, just uncheck the ones you want to buy. Then, uncheck the Show Completed Items in your To Do Preferences, so that only unchecked ToDo Items will appear. As you put things in your cart, check them off. They'll disappear, leaving on your screen only the items that you still have to pick up.

If you know your supermarket well, you can even organize your items by aisle using the Priority option. Obviously, you have more than five aisles in your supermarket. Just divide the supermarket into 5 sections and prioritize each shopping list item accordingly. --Denise Amrich]

ReDo
A very good solution to our problem is to use the shareware application, ReDo. For those not familiar with it, ReDo was designed to implement Repeating To Dos. Simply enter in a To Do item you'd like to have added to your To Do List on a regular basis, schedule its insertion dates, and ReDo does the rest.

But wait, repeating To Do events aren't really a solution to our shopping list dilemma, are they? No, but, what we can use is another feature of ReDo, the "As Needed" Due Date. Instead of inserting on a schedule, this displays a checkbox next to the item in ReDo. Checking this box will insert that item into the defined category of your To Do List!

Here's how you'd do it... Define a "Shopping List" category in both the To Do List and ReDo applications. Then, in ReDo, go to that category and tap the "New" button. write in "Bread", and then tap the Details button. Next to Due Date, tap where it says "No Due Date" and select As Needed from the pop-up list. You're done! To avoid having to select As Needed each time, you can place the cursor in an existing item before tapping the New button. This will default to the same properties (in this case, the Due Date) as the item the cursor is in. Continue to add all of your commonly purchased items in this manner.

When you're ready to build your shopping list, simply go to the Shopping List category in ReDo and check off the items on the list that you need to buy, as shown in Figure A. Once done, go to the Shopping List category of the To Do application, and there it is! If you need to add something, go back to ReDo and check that item (or add it if not there), and it will also be added to your shopping list in the To Do application!

FIGURE A

Select the items in ReDo you want to show up in your To Do List application.

ListMaker
Although designed to be more of a generic checklist application, ListMaker easily can be used as a shopping list and even comes pre-defined with a category to used for this purpose, called "Grocery."