With digital recorders & podcasts you can now build a nice collection of informative information, but many times they are rather long to listen to in one sitting. Audiobook Cutter http://audiobookcutter.sourceforge.net/ makes it very easy to chop it up into smaller sections so you can come back to where you left off, and many MP3 players will remember the track you stopped at and continue from there. You can also burn these tracks into audio files that will play in a regular CD player.
Audiobook Cutter also has another advantage, file sizes can be too big for emailing. With this program you can change the length of the track & it will be smaller files so it passes the size limits on attachments.
Rede has done 2 videos on how to edit and convert your sound files into MP3 files with Audacity http://audacity.sourceforge.net/ and cut up those files with Audiobook Cutter at ShowMeDo http://showmedo.com/videos/series?name=DRALbzyJZ