Editing Unwanted Sounds from Your Audio
Often you'll find that your recordings are filled with undesirable pauses, ums and mouth noises. While breathing sounds are good to leave in, and make your speakers sound natural, more disturbing noises like lip-smacks should be edited out to make the sound cleaner. Do this by scanning your sound files and looking for little blips apart from the more solid, well-formed words. Listen to those sections. Is it a yucky mouth sound? Then delete it! Don't forget to zoom into your project when you're selecting audio to remove, so you can be very precise with your edits.
The goal is to have seamless editing, without any clicks or pops, so that someone listening won't notice that it was fixed.