textclipping - clipboard files for text
Most apps which handle text can generate text clippings. Select the text and drag it to Finder.
Textclippings can be dragged in any place you wish to paste text. A fine format for temporaty clipboard storage.
If you end up collecting many text clippings, overview will get sacrifized, and Spotlight will not help you. This is where File Juicer can be helpful, as you can drop them onto File Juicer to get the content of the clippings extracted as the format it is stored in. Typically as plain text, RTF or maybe html.
File Juicer does not convert the contents of textclippings, it extracts it as it is. The app which produced the textclipping has likely converted it into several formats so the receiving app has some choice of format for import.