Gear That I Use: Organization

This is the first installment of a mini-series in which I will detail some of the gear I am using out there. As with most activities, it takes years to fine-tune your system and with modern manufacturing, gear options abound.
The root word of packing is 'pack' so I'll start with that:

BD Sphynx 42L Backpack - Sleek, lightweight, and it has a hydration bladder sleeve. What keeps me buying this same model when one wears out, is the homogenous fit that it provides for my back.

OR Pack Liner - If it's going to be wet, this super light liner seals everything out. Plus, you can slip it, full with all your gear, from your soggy pack in one smooth pull after reaching camp. I put my tent (or bivy sack) in the bottom of my pack and pack everything else in the liner above it.

OR Zip Sack - The smallest size holds all of my toiletry and First-Aid items as well as my compass/GPS and most other personal accessories. What makes it special is that it unzips across the top so you can see all of your items with ease.

Granite Gear Stuff Sacks - These are color coordinated, mostly waterproof, and extremely light. I put my extra clothing in one and day snacks in another. If you don't stuff them to the absolute max, you can arrange them easily inside your pack so that every bit of space is used efficiently. Just try to keep the heaviest items closest to your back.

Plastic Baggies - Ahhh, the benefits of Petroleum. These really make the final difference in a well organized pack. Unfortunately I have found that on extended trips, they become more and more difficult to seal. I am looking for a re-usable replacement...