When recording your podcast it is important to consider the location of your recording and the placement of your mic. Recording in a quiet, large room will produce a better sound than a room with lots of hard surfaces. Try and choose a location with lot of materials that absorb and diffuse sounds (rooms with carpets and soft furniture).
Before you begin to record, perform a dry run or a sound check at the beginning of your recording session. Try to have each host repeat the same lines into the microphone and then listen back to your recording. Do you notice any plosives ("P-pops") or hyper-sibilant "S" sounds? Is the volume of your voice appropriate for the type of podcast you are producing? Are there any illicit background noises that can distract the audience?
Below is a link to Buzzsprout's Podcast 101 Blog. Review the section entitled "Record your first episode" for additional tips and pointers on recording a quality podcast episode.