Parrots like to feel safe, and if you put the cage alongside a wall, they feel less exposed. The cage should also be out of the sun to avoid overheating, but give your parrot access to sunshine by letting it out every day, or keep it in an aviary where it has access to both sun and shade. A climbing tree placed next to the cage will be much appreciated by your bird. You can make a climbing tree using tree branches set into a large log, and placed in a tub filled first with gravel and topped up with bird sand. If the tub is wide enough it will catch any droppings and bits of tree branches, which can then be easily scooped out.
Toys are also important for parrots to alleviate boredom.
You can buy toys at pet shops, but birds may be just as happy amusing themselves with household objects like wooden curtain rings or empty wooden cotton reels, and fresh natural branches. Parrots enjoy bathing, and need to bathe when they are moulting. They may spray your room with water, due to energetic bathing. You can buy purpose built bath houses at pet shops, with surrounds to keep most of the water in. Some parrots enjoy being sprayed gently with lukewarm water from a plant spray bottle.