Part of the negative association tied to the dreaded and postponed task is a byproduct of the procrastination itself. So however difficult the task will be to face, you will also have to hear your internal critic say "It's about time!" The minute you stop procrastinating, your inner critique will take you to task for having done so. Knowing this, you might feel like procrastinating a bit more to avoid the reckoning.
This is one of those traps that we set for ourselves. Generally speaking, we want to diminish the meta-emotion surrounding what we perceive to be the source of our suffering, the compound interest, as it were. Procrastinating, we construct a narrative of ourselves as lazy, worthless bums.
Last night I set the clock back instead of forward an hour. So the alarm went off at 4:30 instead of 6:30. I thought quite consciously: "spring ahead," ok, so I need to set my clock ahead. But of course November is fall. I looked at my cell phone and was confused about the two-hour discrepancy. My kitchen clock, which I had not reset, said 5:30. Then, of course, I realized what I had done. I couldn't go back to sleep, because I was running in a 5K benefit run at 7:30.
Now it would be logical for me to get mad at myself, but I know I will never be immune from doing dumb things along these lines, especially with dates and times. It feels better to laugh at myself then try to punish myself for this.