What is it about the area under the sink that makes it so tough to keep organized? Maybe because it's dark, hard to get to, and contains lots of pipes that you only have to deal with when there's a problem. Whatever the reason, it generally ends up being a big mess of cleaning supplies, plastic bags, and even the random household essential. (Lightbulbs, anyone?)
If you're looking for a long weekend project, that really won't take that long. Try one of these five organizing solutions for tackling the depths under your sink.