An old thread that's still fun, so here's my offering...
My photo-inventory helps me pack more quickly. What I take and where I put it differs by trip and panniers used, so I tuck a laminated reference card copy in my map case the first couple days. My Sherpa carries Ortliebs -- BikePacker Plus rear panniers, SportPacker Plus front panniers, and Ultimate V Plus Large handlebar bag. My bags are not full, and there is room to carry more if I fully release the BikePackers' built-in compression straps. The Packers' cap-lids provide a large external pocket atop each drawstring-closed pannier, and I am always careful to fold the zippered mesh/envelope inner pockets in two and lay them atop the inner load for easy access to small items. This makes a total of four "pockets" for each front bag and five for each rear bag (each has an external roll-top side pocket held shut by the BikePacker compression straps).
All my load adjustments are made at the rear and vary by the amount of food and reserve water that is carried. If I am going to desert regions and need to carry extra water, then I place my 10l MSR Dromedary water bladder (filled to 6l) atop the blue foam sit-pad on the rear rack. The extra capacity is a reserve beyond the 6.5l on the frame. For long trips, the main compartments of the rear panniers are devoted to foodstuffs. I restock the handlebar bag each day with nibble-snacks to eat as I ride along (energy bars, nuts, dried fruit, etc).
My spare (walking) shoes go inside the cap-lids atop one rear pannier; rain gear fits under the opposite cap-lid. Quick access without wetting the bag interiors.
I prefer small tissue packets for toilet paper; more convenient and space-efficient than paper rolls, and easier to keep dry in the rear bags' side pockets. One packet is always in the HB bag with waterless hand-cleanser and my cat-hole trowel. When I have to use rolls, I de-core and step on them to take up less space and prevent a roll-away if dropped. I am squirrel-away extra paper bits and will nick the spare paper restaurant napkin to extend my supply.
Most of my other stuff goes in the handlebar bag and front panniers. This load remains constant for predictable handling and ease of packing/finding.
I use nylon-covered hair bands to roll-up and color code my clothing. Rolling takes less space and causes fewer wrinkles. Hair bands last much longer than common rubber bands and don't cause snags. They are so useful, I carry extra.
My base clothing is a jersey, riding shorts, socks, gloves, and helmet with glasses-mounted mirror. The stored clothing shown is what I commonly use when I travel in Spring, Summer, and Fall. Jackets go under the front panniers' cap-lids for quick access in changing conditions. I take enough so I will be warm if I wear *everything* at the coldest temps. I ride warm, but cool off when I stop and temperatures drop with nightfall. I awaken at daybreak to pack my bike and am riding 20 minutes later. I go about 32km before stopping for breakfast, and ride till I have gone far enough.
Usually, my sleeping system goes atop the rear rack, but on shorter trips the down bag and pad go inside the rear panniers with several days' food, the tent lengthwise atop the rear rack. One of the attached photos shows the minimal, normal, and expedition arrangements on the rear. I use a closed-cell foam square for a sit-pad; folded in two, it protects the rack from scratches. My U-lock and cable tuck in-between the rack-top load, held by the same Arno straps (
http://www.arnostrap.com/default.asp?content=productdetails&id=12 Swedish, though mine were produced in Ireland). Arnos' metal buckles hold up as the temps dip below -10C; sun-aged plastic buckles tend to fracture under tension at those temps.
For most tours, I take my Coleman Peak 1 multi-fuel stove and a spare generator pipe so I can convert it to kerosene, white gas (naptha), or unleaded pump gas. A stable stove with a large attached tank in the base so it goes a long time between fills and there are no connector leaks. Sometimes, I also take my little homemade methanol stove if I want a second burner or alone to save weight and space on shorter trips. For long-term use, it is less efficient than the multi-fuel stove (particularly at altitude), and my refill options are more limited in the remote backcountry. The Peak 1 will simmer nicely and is far more efficient than my Optimus/Primus liquid-fuel stoves, making it lighter in comparison (fuel weight) the longer I use it.
My tent is a 1-person double-wall Coleman Exponent Dakota with a side-vestibule, single side-entry, and aluminum poles similar to a Black Wolf Mantis 1 (
http://www.blackwolf.com.au/product-details.php?product_id=138&category_id=22 ) or Gelert Solo 1 (
http://www.gelert.com/products/solo_tent ). No longer made after Coleman fled the lightweight solo-hiker market, I bought three at USD$60 each on closeout. Still sold in the Ukraine as the Kraz X1 (
http://www.coleman.eu/p-23381-kraz8482-x1.aspx ). Just large enough to sit up in and remarkably lightweight, I like it very much, unlike some far more expensive models I have tried and rejected. It replaces my Early Winters Pocket Hotel Gore-Tex bivy that finally failed after 30+ years of use. Tents lead a hard life in continuous use, particularly if occasionally stored wet of necessity, leading to mildew that delaminates and dissolves the waterproof urethane coatings. The same malady affects cheap and expensive tents alike.
My Ortlieb medium under-seat bag carries:
= Multi-tool with tire levers
= 1 glued patch kit
= 2 glueless patch kits
= 1 spare tube
= Zefal Twingraph dual-valve manometer
= 1 Crank Brothers mini-pump (spare to the frame-mounted Zefal HPX2; I always carry two pumps in remote country)
Less-used tools and spares live in the Tool Sack in the left-front pannier. O-ringed alu Presta-to-Schraeder adapter lives on rear wheel valve stem, with cap.
My saddle cover is attached to the Sherpa's Brooks saddle rails so I can quickly install or remove it when it rains.
So, there you have it, Danneaux's what 'n' where 'n' a bit of how. C'mon guys, lets see what's-where in your panniers...