Starting with the oldest, and cheapest:
When recording vocals, if microphone 'pop' is a problem use a "pop blast screen". 'Pop' is caused when a singer sings a plosive sound, like a 'p' or 'b' sound. This causes air to get forced out the singers mouth where it hits the diaphram of the microphone causing a pop sound on the vocal recording. Just try holding your hand in front of your mouth sing a few different vowel sound, then try singing a word like "drop". On the 'p' you'll find that a blast of air hits your hand.
A pop blast screen is a gauze placed between the singer and the microphone. It disipates the blast of air without changing the sound of the word. There for no pop!
You can buy pop blast screens. There are cheap ones, but many home recording enthusiasts simply use a metal coat hanger (you know the ones made from a wire) with a pair of nylons, stockings or tights (whatever you call them) stretched over the wire frame. This basically works, not as effective as a pro screen, but it removes the worst effects.
Cheers
John