I've put together 14 high-quality original podsafe instrumental tunes from my Penmachine Podcast into a CD album you can buy. It also includes a bonus data DVD with a bunch of cool stuff that isn't on this website. Find out more...
Mr. Podcast Pedant has good advice: if you're recording a podcast or other voiceover, smile when you talk and you'll sound better. (Others also advise standing rather than sitting, and moving your hands when you talk if that's your style.)
A caution, however: my co-host Paul, a long-time audio engineer, recommends not forcing yourself to smile when you sing, since it tends to make your pitch sharp.