Qlipper is a clipboard manager that is included by default on Lubuntu.
Useage
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To use qlipper it is autostarted in the panel and click on the system tray icon that looks like a clipboard or you can press Control+Alt+v. If you really want an item to always show up right click on the clipboard and press the configure wrench icon click on the sticky items divider and press the add button and add what you want always to be listed in qlipper.
By default qlipper should autostart and should be on the bottom right of your panel. If you need to get it running and it is not go to the menu -> Accessories -> Qlipper.