A small tech item for those of you that like to tinker with your workflow. With OS X 10.5 Apple added stacks to the Dock, to add an alternative way to browse folders or a "stack" of files. If you make a small little Terminal tweak, you can get a stack that will keep track of your last 10 recent applications. Handy for starting work or opening an app you use from time to time but isn't important enough to live in the dock.
Open Terminal and type this as one line:
Then killall Dock and your stack will appear. Looks like this in use:
Source: Mac OS X Hints