I'm not sure what you're level of experience is, so I apologize if this link is too rudimentary: http://www.articulate.com/rapid-elearning/4-simple-tips-for-...

The four steps it mentions are pretty good advice though:

1. Invest in a good quality microphone You get what you pay for here. Don't go crazy with it. I might suggest just an SM58 because it's a quality all purpose microphone that will capture your voice nicely and not so much the ambient sounds from two rooms over

2. Maintain a consistent environment. Don't start recording in one room and then the next day in another. Rooms have character and you'll be able to hear it in the recording. Be consistent

3. Get rid of as much of the ambient noise as you can Now that you have a nice mic, you're going to pick up more sound. Turn off the air conditioning, the TV in the other room, make sure the dog's not barking, shut the window etc.

4. Dampen the sound You don't want a bunch of echo or reverb on your voice over, so find a space and dampen the walls with a blanket or something like that. This should help

Hope this was at least a bit helpful. Good luck!

btw, this is most definitely kleinbl00 territory. Any suggestions kb?