There are a few things you can put on your bed around the wall. A headboard is a common choice, as it not only looks good but also provides a comfortable place to lean against when you're reading in bed. If you don't want a headboard, you could opt for a bed frame that sits against the wall or even just a simple mattress on the floor.
Another option is to put shelves on the wall next to your bed. This can be a great place to store books, magazines, alarm clocks and other items you need close at hand when you're in bed. You could also use this space to display photographs or other artwork. If you want something more functional, consider installing a shelf with hooks where you can hang your robe or pajamas.
Finally, if you have extra space on either side of your bed, consider using it for storage. Tall dressers and nightstands are perfect for this purpose and can help keep your bedroom organized and tidy.