Bose QC20 In-Ear Headphones
Without these headphones, I would have certainly lost days or even weeks worth of focused work over the last few years. These headphones are hands down the most important purchase for anyone working in a busy environment. I personally work out of a coworking space and often spend time in coffee shops getting it done. Without these headphones, I would be far less productive.

Apple Airpods
While the Bose headphones mentioned above are perfect for staying focused during work, the Apple Airpods are perfect for taking calls and going on short walks in between work sessions. They are also perfect for travel. After getting a pair of these I can’t stand going back to wired headphones while talking on the phone.