My first question for you is, is your cat neutered? Your kitty may have a urinary infection, especially if he is peeing frequently and/or you see blood in the urine. Take your kitty to your vet to determine if he is healthy. Other causes of peeing are soiled spots on the carpet, dirty cat boxes, or poor potty training. Clean soiled spots on the carpet with an enzyme cleaner such as Nature's Miracle, and try to keep your cat away from the area until it's dry. To fix poor potty training, he must be locked in a small room (the only time this is alright) with his litter box when you are not home and at night for a few days so he will know what he is supposed to do. Cleaning the cat box is important. Some cats require a cat box-cleaning daily in order for them to go in it. Others are more forgiving and will let you get by with three to four day cleaning intervals. Cats can also pee around the house if they are stressed. Hope this help 
