Brake squeal 2008 accord

I have a 2008 Honda accord that has had a brake squeal since about 1 month after I bought it new. I have read forums online saying that this is a common problem but does anyone have any ideas on how the get rid of it… My car has about 40k miles and I have already changed the back brakes at about 27k and I have read that this is a common problem too. Any ideas?