The other night I was watching an episode of "Cats 101" on Animal Planet and a segment about the Singapura breed mentioned the need to pet-proof one's house in order to keep this very active, very adventurous cat safe.
The advice was not to simply walk around the house and look for trouble spots, but rather to get down on the floor and look around your home. The demonstration showed an adult not crawling around on their hands and knees, but actually laying on their stomach on the floor. From this vantage point, your eye level is close to that of many small pets -- cats, certain dog breeds, and certainly the small and furry exotics -- and thus lets you see things you're apt to miss on your hands and knees and are guaranteed to miss if you're standing up.
Down this low on the floor, you start seeing the kinds of things that you don't want your guinea pigs getting hold of, like cords, plants, curtain hems, and more.
Cool tip from our cat friends...