a bed is good to have in your room, somewhere to sleep is important.
bed
a dresser is good to have in your bedroom. It is good to have in your bedroom, so that way you can put things in your dresser, for example, like clothes. That way when you need your clothes, you know exactly where they are.
dresser
a lamp is good to have in your bedroom, in case you need to see. in case you need to see and it is at night time, maybe you are reading a book, which you will need a lamp so you can see.
lamp
maybe you are into art, and painting, maybe you want to hang some wall art up in your room and to display what you made.
wall art
a bedroom desk is good to have, maybe you want to read, but do not feel like getting in bed yet, you can sit at your desk and read.
bedroom desk
a chair to go with your desk in your bedroom would be helpful. If you do not feel like going to bed yet, and you want to read a book, you can sit down at your desk and read a book.
bedroom desk chair
a mirror is good to have in your bedroom, that way if you are getting ready to go and do something, you can see what you look like before going out.
bedroom mirror
pillows are a good idea to have for your bedroom for when you sleep and to be comfortable.
wBed Pillows: Firm, Soft, & Everything in Between - IKEA
