One of the best changes in my life that have resulted from #AgilePM and #Scrum is that I've largely stopped being deadline focused and started being what I call "stack" focused, or backlog focused. There's an unlimited amount of things to do in this life. Pick what matters most to you, put it at the top of your stack, and work your way through it. Crunch time and cram sessions lead to burnout. Pace yourself as you work through the stack. This has made me happier and more productive.