While changing you brakes, remember to properly lubricate and clean the parts and bolts that require attention to properly install your brakes.
Brake Pads – use a little ceramic or silicone brake grease on the back of your new brake pads to prevent squeaking.
Guide Pins – remember to remove the guide pins from the caliper and clean them thoroughly before applying some silicone brake grease to each one. Make sure you clean the rubber boots that the guide pins slide into as well.
Caliper bolts – when you reattach the caliper to the knuckle, apply some blue thread locker to your caliper bolt after you clean and dry them. This will give you a good tight fit and prevent them from backing out.