Procrastination

I think procrastination leads to a downward spiral of not accomplishing anything. The more you procrasinate, the more you keep thinking about the ones that you've procrastinated and that preoccupies your brain and prevents it from paying attention to other important things, which in turn get delayed. I read this book called Stumbling on Happiness and that says that the brain tends to keep thinking about something that's left unfinished - this can both lead to happiness and sadness. It is upto us to exploit this nature of the brain. It's a great book, BTW.