See ClickPop for tips on removing clicks and pops from vinyl recordings.
Manually fixing 'breath sounds' on a vocal recording can take an inordinate amount of time - so if possible avoid them in the first place. A 'pop-shield' between speaker and microphone can help, and can be made cheaply. Here's an easily-made <a href="http://www.jakeludington.com/podcasting/20050321_build_your_own_microphone_pop_screen.html">pop filter</a> using a small embroidery hoop and a stocking. It's credited to Jake Ludington.