I don't know how many products you sell, but let's say you sell about 4 products. You sell roughly 6-7 copies a day, and you site views are about 1500 uniques a day. Now, you nee to keep a constant eye on these numbers, and you need to do things to make these numbers go up, and not down.

If you work without structure, it's difficult. My tool is designed such that you can take a look at the frontpage and you instantly see how everything is performing.

The todo list is a standard todo list (like basecamp has), but the fact that you can keep your product based todo separate from the rest of the usual todo is helpful. When a product is cruising along fine based on trends you observe, you can ignore the product from a business point of view. When things start getting bad, you have a todo list you can refer back to.