If you still have your empty garbage bags sitting under the sink in the box you bought them in, try this storage method instead. Just take the huge roll of garbage bags out of the box they came in, slide them onto a paper towel bar, and you have a space-saving, one-handed garbage bag dispenser.
Yeah, it looks a little silly, but the photo above tells the tale. We can see this being especially useful if you have a portable paper towel rack that can sit on the wall near the rubbish bin or in the garage. Besides, pulling one off the roll when you need it definitely beats fumbling for a loose bag in the box. Most garbage bag rolls will sit neatly on the roll, and as you pull one bag off, the roll spins and makes the next one available whenever you need it.
Unclutterer suggests buying a spare roll you can stash anywhere and mounting your garbage bags on it. The original tip was specifically to make yard-work easier. Whichever approach you take, give it a try. It works like a charm.