I like to carry a diamond sharpener in one of the leatherman side pockets such as

http://www.buckknives.com/index.cfm?event=product.detail&productID=3033

Also a AAA version of the Mini Maglite

http://www.maglite.com/product.asp?psc=2AAACELL&pt=R

If you remove your leatherman to use it, It will be a little tight getting it back in but a sharp knife and a light are the two most basic core components to my EDC, the rest come in handy too but the multitool, light and sharpener are what I use most often. Or as I like to refer to my EDU. Every Day Used