I got so consumed, anxious, and outright frustrated last year that I ran out of steam when some big life issues came up. I completly lost it and gained 25 pounds in less than six months.
I'm more relaxed now, which makes losing easier again. Instead of torturing myself over whether I not I should have that extra portion, that dessert after I'm already full, or the snack at the candy counter, I stop and ask myself how I'll feel tomorrow about what I eat today. Then I make my decision and stick with it. No more debating, no more lamenting that I want this or that and "can't" have it, I simply make the decision and move on. Now making better decisions without wanting to throw a tantrum has become second nature.
This mindset has done wonders for me and keeps the exhausting aspect of needing to lost weight at a minimum yet still allows me to make reasonable progress.