How to stop procrastinating
machineslikeus.com
machineslikeus.com
It works for me.
It doesn't say how they drew that conclusion from the evidence, but it seems a bit of a leap to me.
I think it's because a specific concrete task has less unknown in it, and therefore is easier to do; easier to estimate how long it will take; easier to judge your performance; and easier to know when you have completed the task - for these reasons, it is less scary.