Originally Posted by theducks
Use the Clipboard tool to save (and later past your custom boilerplate(s))
Since the names are similar its actually Clips that you want to use (under Tools->Clip Editor). The Clipboard History under Edit->Paste From Clipboard History is only meant for temporary saves and pastes.
Either of the ways mentioned by theducks or turtle91 work fine. Create a clip with all the text, so when you add a blank page just select it all and paste the clip. Or create your template file, and right click on it and select Add Copy.