Invest in your psychological comfort. Many employees rarely give much consideration to the decor of their workspaces. Research suggests that they might be more productive if they did. The more comfortable we are, the more cognitive resources we have available for focusing on our work.
Which is why taking the time to personalize your workspace (to the extent that you can), from modifying the layout and direction of the furniture to making even modest changes, such as adjusting the height of your monitor or the amount of lighting available at your desk, can have a reliable effect on your productivity.