I recently found a native app called Shift that I love. It allows me to log into a bunch of my Gmail inboxes, as well as Medium, Twitter, GitHub, Amazon, Facebook and more.
I also am a huge fan of the Pomodoro Technique, in which you work for 25 minutes, take a break for five minutes, and repeat. It really helps me stay on track on a regular basis.
What other apps/tricks/tools do you use with your busy schedules?