Few cat behavioral problems are as gross as inappropriate urinating. If you want to avoid having your little guy do his business all over the house, you have to be proactive and understand what's motivating his behavior. When you address that, you can head off any future problems.
Get him neutered. Male cats use urine like street gangs use graffiti -- it's their way of marking territory. You don't have to put up with that, though. The vast majority of male cats who get neutered stop marking, so take your little guy to get snipped. Neutering has a score of other benefits, too, like decreased aggression and no risk of accidental pregnancies, so you have no reason not to.
Clean urine spots with non-ammonia cleaners -- use something specifically formulated for pet urine. Cats like to mark where they smell their own scent or the scent of another kitty, and since their urine has ammonia in it, it's an ineffective cleaner and may motivate your cat to mark the spot again.
Take him to the vet. Inappropriate urinating is often symptomatic of health problems, like kidney and thyroid conditions and urinary tract infections. Getting the problem treated is good for your cat and the life of every blanket he uncontrollably wees on.
Keep the litter box clean as a whistle. Some cats are pickier than others, and if he doesn't like the state of his litter box, he may not use it. Scoop that thing out every day, and every two weeks dump out all the litter, rinse the box and refill it with new litter.
Place the litter box in a convenient location. If your little guy has trouble climbing in and out, he may decide it isn't worth the trouble and use your ottoman instead. While the box should be in a relatively private area, he should be able to get in and out without much effort.
Tom Ryan is a freelance writer, editor and English tutor. He graduated from the University of Pittsburgh with a degree in English writing, and has also worked as an arts and entertainment reporter with "The Pitt News" and a public relations and advertising copywriter with the Carnegie Library of Pittsburgh.