I use the clippings plugin for firefox:

https://addons.mozilla.org/en-US/firefox/addon/1347
https://addons.mozilla.org/en-US/thunderbird/addon/1347

You can also get it for thunderbird as well.

I use both.

You can easily organize your clippings into folders, move them around, whatever you want. You can also export the clippings file to an html file or I believe it's an rdf file. I've always exported to html. You can also title each clipping.

Years ago I used a multi clip app for support - it was great except it didn't title anything. I had some great responses and notes in this thing and had to go thru it file by file. Total pain.

The clippings plugin is free.