In my case I tried to quit the past 20 years and I feel I'm finally done with smoking!
I'm on the patch on day 25 and no doubt feel good!
Yes, over-thinking can hinder, at least that was to blame in my previous attempts. It felt like all that thinking made it all the more stressful.
I'm on the patch and taking it easy. I sleep 14 hours a day and have a low-grade depression but I'm hoping it is temporary.