One of the best investments I have made in my home office is a larger second monitor. Especially when I am working with numbers, or evaluating creative materials for approval, having a big monitor allows me to make decisions quickly. You are not stuck with the monitor you’ve been using for years, or whatever came with your computer. Consider upgrading your monitor, or adding a second (or third) to your setup. Below are a few monitors at various price points.
$397 LG 27UK670-B 27” 16:9 4K Ultra HD IPS Monitor with USB Type-C
$220 Sceptre IPS 27″ QHD 2560 x 1440p LED Monitor DisplayPort HDMI up to 165Hz AMD FreeSync Premium RGB Build-in Speakers
$128 Sceptre New 22 Inch FHD LED Monitor 75Hz 2X HDMI VGA Build-in Speakers