PTHPasteboard 2.2.2, the special clipboard archive for Mac OS X – Macitynet.it
The freeware that weighs only 129K is available for both Mac OS 10.2.x and 10.1.x and is basically a buffer, an element tank that keeps track of the last 20 elements (or a greater number of your choice) that you have copied / pasted into your work. You can move the application to one of the Applications folders and decide to launch it when you start your computer when you log in (using the Login control panel in the preferences for this).
Be careful, however, to inadvertently leave traces of texts and images that you have copied and pasted and then removed: they could remain in the PasteBoard even if it would have been appropriate to discard them!
To download PTH Pasteboard go to this page http://www.pth.com/PTHPasteboard/