For a little stuff, how about a NewSun gear Expedition Liberty pouch? For a lot of stuff, how about a SpecOps Design Packrat? Both are for sale at
www.actiongear.com and also have their own websites. These things have loads of pockets, loops, and pouches for little stuff like knives, tools, food bars, lighters, compasses, keys and other pocket junk. I have used both brands and they are nice. I currently use a New Sun and another small generic pouch to carry stuff in my schnazzy leather attache (for the office), then I can just take them out and put them in cargo pockets, on my belt, in another backpack or my shooting bag, or whatever when it's time to bum around. Nice setup in my opinion.