Do you have someone in your house who likes to make noise? Mastering sound control is learning how to stop vibration, and here's how.
Types of Soundproofing Materials
The more things you have on your walls, the better: drapes, carpeting, soundproof foam, Quietrock Drywall, Soundproofing insulation, acoustic tiles. The more things you can add that absorb sound, the better.
Walls, Windows and Doors
Walls - Put all soundproofing insulation in your walls, and cover it with Quietrock drywall. You can also mount the walls with acoustical tiles, fabrics, and other vinyl barriers. You could also only add Quietrock over your existing wall for more coverage.
Windows - Soundproof windows can be added behind your exising window for a less invasive fix. At least have a triple-paned glass window.
Doors - Doors are also notorious for leaking sound. Swap hollow core doors for medium density fiber (MDF) or solid wood, and add closed cell foam tape or weather stripping around the doorframes.
Remember - the more things between you and the studs, the better. You don't need to spend a fortune to keep your room quiet enough to sleep.