The only organization to my hotbar is sword in the first slot, and for some reason I like the torches in the last. Everything else just gets tossed in randomly except when I'm having a mining session. Then it's sword, pickaxes, then shovels, and again torches.
It depends on what I am doing, but I almost always have a sword (iron), torches, a pickaxe (iron), a bow (if I have one), and a stack of dirt or cobble blocks.
When I'm travelling I always have a compass too.
For building: Building block > Building block > Building block > Building block > Building block > Food > Pickaxe* > Dirt.** *I love to misplace stone brick... **For temporary towers.
Usually though, I only have a "plan" If I'm doing it for a while. If I'm just going down into my mine for 2 minutes and then coming back, I usually only have a pickaxe, sword, torches, and random crap lying around. :biggrin.gif:
6 and 7 vary on what im doing, same with bow. Torches and sword are positioned so i can switch between quickly while in dungeons or digging, everything else idk, just feels naturally for equipment to be the first few.