Bed bugs like to and can hide almost anywhere. They usually like to be around the places their food lives. Since their food is US, it stands to reason they can live anywhere we are. Usually you will find the bugs in your bedrooms and living room. That does not mean you should not check other rooms if you have them but those are the two hot places to start.
They can also hide in the strangest places. They generally like the seams of furniture and mattresses, so if you are checking start there to look for fecal matter or remains. If you know you have Bed Bugs it is going to be more difficult. You will have to look in the cracks of wooden or metal bed frames.
Furthermore you will need to look in the flooring whether carpet, wood, or tile. The bugs can hide in wall paper, books, newspapers, and magazines. These creepy little creatures can hide in electronics such as picture frames and clocks. If you or your children sleep with your cell phones, the phone will need to be checked as well.
You will need to set aside the time to actually take apart the bed. The entire bed down will need to be taken down to the frame pieces to truly know whether you have Bed Bugs or not. Since they are so tiny and flat before they have eaten they can hide in the tiniest of places.
Unfortunately entire colonies of the bugs can be found under things such as wall paper so you have to check thoroughly. Furniture such as night stands, chester drawers, living room tables will have to be emptied. Then the drawers taken out and examined. You should even go to the point of turning them upside down to check. Bed Bugs do prefer cloth, wood, and paper.
Before you start looking to see if you have the bugs you will want to designate one room to work in. You many even want to work in one area of the room. Like the bed area. Once the bed and the frame are taken apart and checked you can move them against the wall. Then move the other furniture you check into that area, even living room furniture. In this manner you will not spread the Bed Bugs all over the house.