You still have to find the right bed for your room though which can take some time and some searching at local bed shops or even online as more people are turning to the internet to save them the time and hassle of going to bed shops where you are likely to be constantly bugged by a sales person pressuring you in to a sale.
Looking online you can see the designs and be able to draw up a shortlist if you have a few designs that you like and can't decide on which one to buy.
The choice will often be affected by some factors like the size of your room, if you only have a small room then the largest sized bed you may be able to fit in your room might be a double or a single bed.
Obviously larger rooms are able to have king size beds but not everyone will choose one since they can take up a lot of room that could otherwise be used for storage or any other furniture.
There are a number of styles available and this will often come into play when you choose to decorate your bedroom, some people choose their beds to match their room as it is whereas others will use their new bed as the first step when it comes to redesigning their rooms and so this can be tougher since you will have to visualise how your room will look when buying your bed as opposed to seeing how it is now and buying a bed that suits your room.
With beds you tend to be able to choose from two different materials that your bed will be made from, one is wood and one is iron or some other form of metal.
Most wooden beds can come in a much varied range of designs and styles as wood is much more customisable than metal, metal beds do have their advantages though as they can help create a classical or regent look to your room.
Make sure your room compliments the rest of the décor and suits your room as it will create a pleasant atmosphere that you'll enjoy relaxing in when it comes time to go to bed.