Here's a battery organizing tip from Larry [Thanks Larry]. The PowerPax Battery Organizing Caddies come in a variety of colors and sizes to hold various battery types from AAA, AA, 9V, C/D Cell batteries, etc. Some PowerPax Battery Caddies can carry a combination of batteries in one pack which is handy when you need a 9V for your Rode VideoMic and AA's for your portable recorders. It's also a handy way to prevent confusion on which rechargeable batteries have been already been used and unused. All found on Amazon (click here).
PowerPax Battery Organizer Caddy for AAA, AA, 9V, C/D Cell
Pretty cool solution if you're just working with small batteries. If i'm packing with a larger bag and have to deal with more equipment, i've been working with Tackle Boxes (as seen below). The clear case makes it easy to find what you're looking for and the adjustable dividers can be tailored to what you're trying to fit.
The tackle boxes are a great way to sort camera batteries, AA, AAA, compact flash cards, small cables, etc. Very inexpensive and durable. I can also label sections of the tackle box to determine Used and UnUsed Cards/Batteries. The tackle boxes i've found that work best and cheapest is the 'DEEP' versions from Plano which you can find in your local Walmart or via Amazon (here).
Plano 'Deep' Storage with Dividers