Time management. Not only can it help you when dealing with deadlines, it can also help you manage multiple projects at once. Knowing how many hours to put into project A or B each day to still meet goals is pretty important. It can also bleed into your out-of-work life as well. Blocking off time to relax/learn/workout is important to get the most out of your day. It is definitely something I have struggled with but have seen results when actively trying to manage my time.