getting good audio recordings

A lot can be done in post. You should use noise reduction, compressor and limiter. Premiere Pro has all of them. They can be applied to the whole track or just certain clips. 

Your environment is crucial. If you're getting any reverb or other 'background' issues, hanging sound blankets around you helps a ton. And while 'official' sound blankets ain't cheap, most any moderate to heavy blanket will actually to. Hang them over a rail on say three sides, with your computer in front of you. That will probably clean up your sound a lot.

Sometimes those little 'plosive' screens between you and the mic can help a lot. This is pretty much an individual thing. Some mics and some peolple don't need them as much. Some mics and/or people need them badly.

Using Audition to capture the recording as Ann suggests can be HUGE. Over on the Audition forum, they have a lot of links to YouTube tutorials by Mike Russell on recording including doing VO work. Go check those out, great information.

Neil

Good audio start with the recording:

You need a good headset, plopscreen and a good recording environment and

Audio software such as Audition.