Just putting a bowl of water on the floor is old fashion. The water eventually gets stale or the cat simply chooses to drink out of the toilet instead. To get your cat to drink water, consider a drinking fountain.
Since there are so many drinking fountains, Business Insider has chosen the best on the market. Now you can look at different cat fountains to find the best one for you and your cat. Remember, the more water your cat drinks, the healthier it can be, which might be counter-productive since a healthier cat will likely get in more trouble as well.