Default Folder X is a system preference pane that can save you a lot of time finding and flipping through folders, especially when opening and saving files.
The primary interface pops up with every open and save dialog, across all your applications, giving you faster access to multiple folders and commands. You can jump to favorite and recently used folders (even by clicking on open windows), enter Spotlight metatags, and manage files and folders right from the dialog--so you don't need to go to the Finder for simple tasks like renaming and deleting.
Default Folder X also lets you "rebound" to the last file you were using, and you can work with recent and favorite folders right from the dock or menu bar. The fact is, once you see all the added functionality in the open and save dialogs, we think you'll wonder why you hadn't already downloaded this app.
Default Folder X may be a little expensive, but we think some will find that its smart, time-saving functionality quickly pays for itself.